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Garmin GPS 50 GPS Receiver User Manual

1. On line two you may select one of three direction options desired track bearing or course to steer You may also select one of three distance options steer direction and distance range or distance made good On line three you may select one of three direction options course made good track or turn instruction You may also select estimated time enroute or one of two velocity options ground speed or velocity made good During the process of acquiring satellites the GPS 50 will not provide navigation data The CDI Page will indicate this condition by displaying NO POSN on line 1 and all navigation data on lines 2 and 3 will be blank If the GPS 50is not navigating to a waypoint the CDI will indicate this condition by displaying NO ACT WP no active waypoint and all navigation data except speed and track will be blank 3 6 WAYPOINTS The GPS 50 allows you to create store and use 250 alphanumeric waypoints Awaypoint consists of aname up to four letters or numbers and its latitude longitude location You will have the opportunity to use waypoints extensively while operating the GPS 50 For example you can navigate to a waypoint build a route using waypoints and perform trip planning using waypoints a View Action KWOT POSN Selection POSN REN DEL Latitude _ PpWS4n3 Waypoint Name B 46 15 Longitude WAYPOINT DEFINITION PAGE The Waypoint Definition Page may be displayed by pressing
2. WPT RTE o A ENT 2 4 Pressing the MSG SET key allows you to view new messages when the MSG banner is flashing See Section 2 6 and Appendix A Pressing the MSG SET key also selects the Setup Pages which allow you to view satellite tracking status and customize the unit as you like See Section 3 2 and Chapter 4 Pressing the GOTO MOB key once allows youto initiate the GOTO function which will set an instantaneous course to any waypoint See Section 3 8 Pressing the GOTO MOB key twice in succession allows you to initiate the Man Overboard function which will set an instantaneous course to the captured position See Section 3 9 Pressing the NAV key selects the Navigation Pages which allow you to view navigation information and perform planning functions See Sections 3 3 and 3 5 and Chapter 5 Pressing the WPT key selects the Waypoint Pages which allow you to create edit delete andrename waypoints In addition you may view your nearest waypoints See Sections 3 6 and 3 7 Pressing the RTE key selects the Route Pages which allow you to edit review activate and delete routes See Chapter 6 Pressing either of the arrow keys allows you to move the cursor scroll through information lists and enter letters of the alphabet The alphanumeric keys allow you to enter letters and numbers into the GPS 50 a V If you want to enter a number in a numeric field for instance 1 simply press the 1 key
3. To change the latitude longitude Use an arrow key to place the cursor under the latitude field Check the hemispheric designation N or S of the latitude If itis correct go to the next step If it is incorrect press the CLR key until the correct hemispheric designation is displayed Enter the latitude remember to complete the data entry by pressing ENT Check the hemispheric designation E or W of the longitude If it is correct go to the next step If itis incorrect press the CLR key until the correct hemispheric designation is displayed Enter the longitude remember to complete the data entry by pressing ENT 3 4 AUTOSTORE Waypoint Name Storage Selection Latitude Longitude AUTOSTORE PAGE The AutoStore Page is displayed by pressing the ENT key while viewing the Position Page This page allows you to capture your position at the touch of abutton so that you may easily return later Additionally you may record your navigation path by inserting the captured waypoints into a route see Section 6 5 To capture your present position Press NAV until the Position Page is displayed Press ENT The AutoStore Page will be displayed with the default waypoint name on line one The waypoint name begins with a character followed by a 3 digit number for example 010 If you wish to give the waypoint a name of your own move the cursor under the waypoin
4. If you want to enter a letter in an alphanumeric field for example A press the 1 key to display B then press the left arrow key once to select A you may also press the right arrow key three times to display the A Pressing the CLR MORE key erases information in the cursor field If the cursor is over a cyclic field pressing the CLR MORE key will toggle through several available options Pressing the ENT key completes the process of data entry If the cursor is over a confirmation field pressing the ENT key indicates your approval 2 5 ENTERING DATA To enter data you must first move the cursor under the desired field by pressing the right or left arrow key To enter a number Press the key that is labeled with the desired number The numbers will fill in from the left side of the field similar to a typewriter You must enter any leading zeros in the field For example if you wish to enter 51 in a three space field you must press the 0 5 and 1 keys in that order Press the CLR key if you enter an incorrect number Press the ENT key when you have filled all significant digits of the field with numbers trailing zeros are automatically filled in by the GPS 50 To enter a letter Press the key that is labeled with the desired letter Press the right or left arrow key until the desired letter is displayed Press the CLR key if you enter an incorrect letter Press the ENT key when a
5. SATELLITE STATUS PAGE The Satellite Status Page may be displayed by pressing the SET key This page shows the number of satellites tracked and visible dilution of precision DOP and estimated position error EPE DOP isameasure of the satellite geometry quality and hence the relative accuracy of your position 1 meaning the best and 10 meaning poor EPE which is computed using the satellite geometry DOP signal and data quality receiver tracking status and other factors is an overall measure of your position accuracy DOP and EPE are advisory information only The Satellite Status Page also shows the identifier 1 32 azimuth elevation and signal quality of up to eight visible satellites The azimuth is an angle from 000 to 359 which indicates the bearing from the present position to the satellite with O00 representing true north The elevation isan angle from 00 to 90 which indicates the height of the satellite above the horizon where 00 indicates the horizon and 90 indicates a satellite is directly overhead The azimuth and elevation are useful for determining whether a satellite signal is blocked by buildings mountains or other obstructions The signal quality is anumber from 1 through 9 with 9 indicating the strongest signal If a satellite is visible but not tracked the signal quality will be blank The Satellite Status Page will automatically display each satellite sinformation for three seconds You may al
6. map datums and interface options Low Power Consumption Battery Saver operation which draws less than 1 1 watts provides up to ten hours of continuous operation with four AA size alkaline batteries Man Overboard The Man Overboard function sets an instantaneous course to the captured position providing rapid response to an emergency situation Trip Planning Analyze distance andtime requirements for your trip Compute the time of sunrise and sunset at your destination Alarms An alarm clock andtimer allowthe GPS 50 to watch the clock for you Arrival anchor drag and CDI alerts help you safely navigate your craft Interfaces Interface with marine autopilots and graphical plotters 1 1 We encourage you to read through this manual and experiment using the built in simulator This will help you quickly master the power of the GPS 50 1 2 OPERATIONS You may use your GPS 50 for both portable and fixed operations The unit may be operated from external AC power using a battery charger external 5 40 volt DC power using the power data cable or cigarette lighter adapter or using a battery pack Handheld Operation For handheld operation the GPS 50 is powered by a AA battery pack which should be filled with four high quality alkaline batteries commonly found at retail stores Arechargeable nicad battery pack is also available for handheld operation In order to track GPS satellites the unit must be situated with
7. to waypoint To add a waypoint to the active route Use the cursor under the to waypoint press the arrow keys to scroll through the waypoints until the waypoint where you wish to insert the new waypoint appears Enter the waypoint name The existing waypoints will shift to the right to make room for the new waypoint To delete a waypoint from the active route With the cursor under the to waypoint press the arrow keys to scroll through the waypoints until the waypoint you wish to delete appears Press CLR followed by ENT to delete the waypoint 6 5 BUILDING ROUTES USING AutoStore GARMIN s AutoStore feature introduced in Section 3 4 allows you to capture your position and store it in the route of your choice at the touch of abutton By doing so you are building a route consisting of waypoints stored along the path you travel 005 path as you proceed to your destination so that you can safely return from the opposite direction Simply use the AutoStore function to record strategic waypoints as you travel and insert these waypoints in an empty route from the AutoStore Page To record your route Press NAV until the Position Page is displayed Press ENT The AutoStore Page will be displayed with the default waypoint name If you wish to give the waypoint a name of your own move the cursor under the waypoint name and enter the name of your choice With the curs
8. END MSGS title is displayed Refer to Appendix A for a complete list of GPS 50 messages 2 7 OPERATING MODES Three modes are available which will allow you to operate your GPS 50 in the way which best suits your needs see Section 4 2 Normal mode is most suitable for high dynamics applications The GPS 50 will typically operate up to six hours on a single pack of batteries Battery Saver mode is suitable for most applications and will extend the battery life to as much as ten hours Simulator mode allows you to simulate the operation of the GPS 50 while at home orin your office The simulator mode can be used while learning to use your GPS 50 and is ideal for planning routes and entering waypoints Keep in mind that the GPS 50 is not tracking satellites in the simulator mode You should never attempt to use the simulator mode for actual navigation If you are using your GPS 50 for the first time we encourage you to review Chapter 3 which introduces the GPS 50 s basic features Additionally you may wish to review Chapter 4 on custom setups Afterward you may want to read through the rest of this manual and make further use of the built in simulator to practice with the advanced features 2 6 CHAPTER 3 BASIC OPERATION 3 1 POWER ON After you turn your GPS 50 on it will conduct a series of self tests and display the following notices VER x xx COPYRIGHT 1991 1992 and GARMIN Following completion of
9. I g I S ENT key The CDI Page will be displayed wag Kt which indicates your present speed GS TDR track TRK range RNG and bearing BRG to the waypoint GRMN gt gt ae o o ee Examine navigation information Press an arrow key to place the cursor under line one Press MORE to view the GOTO waypoint Use the arrow keys to move the cursor under the fields on lines two and three Press MORE to select a different display option Experiment with your GPS 50 Now that you are on your way to GARMIN why don t you take some time to experiment with the GPS 50 Press each page selection key to become familiar with available pages Practice using the cyclic fields to display new information If you want change the simulation speed Create a waypoint of your own and GOTO it Ifyou have not customized your unit this may be a goodtime to review Chapter 4 for information concerning custom settings Doing so will help you understand what each setting will do If you wish to stop the simulation simply turn the GPS 50 off CHAPTER 4 UNIT CUSTOMIZATION The GPS 50 is designed for maximum flexibility The unit features Setup Pages which allow you to customize your unit by setting a wide variety of parameters You may cycle through the Satellite Status Setup Menu and Message Pages as illustrated below by pressing the SET key repeatedly until the desired page is displayed MESSAGES p 3 35
10. LU rk DR With the cursor under the to waypoint enter up to nine waypoints to create the route Press RTE to return to the Route Catalog Page when editing is completed To display the Route Review Page Select the desired route on the Route Catalog Page and press ENT Press MORE until EDIT is displayed Press the ENT key The Route Review Page will be displayed showing the waypoints of the first leg You may view additional legs by pressing the left or right arrow key while the cursor is under the to waypoint Press RTE to return to the Route Catalog Page To insert a waypoint into a route To insert a waypoint into a route Select the desired route on the Route Catalog Page and press ENT Press MORE until EDIT is displayed Press ENT The Route Review Page will be displayed With the cursor under the to waypoint press the arrow keys to scroll through the waypoints until the waypoint where you wish to insert appears Enter the new waypoint The existing waypoints will shift to the right to make room for the newwaypoint If you attempt to add a waypoint in a route that already contains nine waypoints you will be informed with the message RTE FULL Press RTE to return to the Route Catalog Page when editing is completed To delete a waypoint from a route Select the desired route on the Route Catalog Page and press ENT Press MORE until EDIT i
11. With the cursor under the ground speed field enter your desired speed The GPS 50 will now simulate a moving craft and compute navigation information using the speed 4 3 USER SELECTABLE ALARMS ARTY ALR Alarm Select Alarm Distance ALARM PAGE The Alarm Page features three alarms anchor drag arrival and CDI To arm disarm the anchor drag alarm Press MORE until ANCHR ALR is displayed Press the right arrow key to move the cursor to line two Toarm the anchor drag alarm enter anon zero distance If your boat drifts away from the anchored position more than the specified distance you will be informed with an alarm tone and the message ANCHR ALR Todisarm the alarm enter zero for the distance To arm disarm the arrival alarm Press MORE until ARIVL ALR is displayed Pressthe right arrowkey to move the cursor to line two Toarm the arrival alarm enter a non zero distance The arrival alarm willinform you with an alarm tone and the message ARIV when you reach your destination The alarm distance will also be used to inform you when you approach a route waypoint with the message APCH__ To disarm the alarm enter zero for the distance To arm disarm the CDI alarm Press MORE until CDI ALARM is displayed Press the right arrow key to move the cursor to line two Toarm the CDI alarm enter a non zero distance The CDI alarm will notify you with an alarm tone
12. magnetic variation at the present position will be displayed To select user magnetic heading Withthe cursor under the heading mode select field press MORE until USER MAG is displayed Press ENT With the cursor under the magnetic variation field enter the desired value If the direction E W is incorrect press CLR until the correct direction is displayed then enter the numeric value 4 9 FILTER SETTINGS Position Filter Response Velocity Time Select Select FILTER SETTINGS PAGE The GPS 50 allows you to choose the filter response time for position and velocity outputs This may aid you in smoothing the data in rough seas or for sail boating To select filter response time With the cursor under the position velocity select filter press MORE to select VEL or POSN Press ENT Press MORE to select FAST 3 seconds MED 20 seconds SLOW 120 seconds or AUTO Typical users will want to choose the Auto setting for optimal position and velocity filtering This will allow the GPS 50 to respond quickly to changes in heading and speed while providing smooth data during cruise 4 6 4 10 OUTPUTS Output Select OUTPUT PAGE You may select the output data format for your interface requirements To select the GPS 50 output format Press MORE until the desired output format is displayed NMEA 0180 NMEA 0182 also known as NMEA 0180 Complex and NMEA 01
13. pre defined sequence of waypoints The GPS 50 route capability allows you to create and store ten routes each containing up to nine waypoints Routes 1 to 9 the storage routes can be activated to travel either in the order you defined the waypoints or in reverse order Route A the active route is the route you are navigating The waypoint toward which you are navigating is called the active to waypoint The waypoint immediately behind you is called the active from waypoint The line that connects the active from and active to waypointsis called the active leg The GPS 50 features automatic leg selection which will select the route segmentclosestto your position asthe active leg The GPS 50 also features automatic leg sequencing As you pass a waypoint in the route the unit will automatically select the next waypoint as the active to waypoint You may alternate between the two route pages as illustrated below by pressing the RTE key MYR KM F doy jq AL 8 ig Route Catalog Page Active Route Sm 6 2 ROUTE CATALOG First and Last Route Waypoints Total Distance Route Number tA rt1 rt9 ROUTE CATALOG PAGE The Route Catalog Page provides a list of the routes stored in the GPS 50 This page shows the route number first last waypoints in the route and the total distance traversed by the route For example in the illustration above route A begins at FMYR Fort Myers Flo
14. the WPT key It allows you to review create modify delete and rename waypoints To create modify or review a waypoint With the cursor under the waypoint name field enter the desired waypoint name Press the MORE key until POSN is displayed if it is not already displayed under the view action field Tocreate or modify position enter the waypoint latitude and longitude as described in Section 3 3 NOTE If a waypoint is being used for navigation its position cannot be modified An attempt to modify the position of such a waypoint will result in the message ACTV WPT To rename a waypoint With the cursor under the waypoint name field enter the name of the waypoint to be renamed Press MORE until REN is displayed Press ENT the following page will be displayed Old New Waypoint Waypoint Name Name Enter the new waypoint name To delete a waypoint from memory With the cursor under the waypoint name field enter the name of the waypoint to be deleted Press MORE until DEL is displayed 3 6 Press ENT the waypointis now deleted from memory NOTE If you wish to delete a waypoint that is used in a route first remove it from all routes before attempting to delete the waypoint An attempt to delete a waypoint used in a route will result in the message ROUTE WPT A stored waypoint is used by entering its alphanumeric name on a waypoint namefield When aw
15. the antenna pointed straight up and should not be blocked by objects or people signal reception through thin fabric such as canvas may be adequate but degraded A lanyard is provided to prevent accidental dropping of your GPS 50 Connect the lanyard to the eyelet on the back of the unit Fixed Mount Operation A universal mount is supplied for swivel or surface mount installation in a boat The unit may be operated using vehicle power through the power data cable or it may be operated using the battery pack While using vehicle power you may wish to leave the battery pack in the unit In the event of vehicle power failure the GPS 50 will automatically switch to battery power In addition to supplying power to the unit the power data cable allows you to interface your GPS 50 with other marine electronic devices such as plotters or autopilots A Marine RV Remote Antenna is available for installations which require an external antenna for an unobstructed view of the sky This weather proof antenna includes 30 feet of low loss antenna cable The remote antenna has been constructed to thread onto a standard 1 antenna mount Antenna mounts commonly usedto attach VHF radio antennas and Loran C couplers are readily available from your local marine accessories dealer A Magnetic Mount Antenna is also available for attaching a remote antenna to ametallic surface This weather proof antenna includes 10 feet of low loss antenna cable A cigarett
16. under the United States Department of Defense imposed Selective Availability program C 2 ELECTRICAL WIRING POWER DATA CABLE C ee 12 24 VDC RED 4 GROUND BLACK GPS 50 ALARM BLUE 16264 DE A LINE BROWN NMEA ALARM OR RELAY DEVICES a an CAUTOPILOT PLOTTER B LINE ETC SHIELD GROUNDED ONLY AT THE GPS 50 The GPS 50 power data cable allows you to connectthe unit to vehicle power systems other marine electronics and a remote alarm beeper The harness will plug into the connector located on the rear panel of the GPS 50 To connect to vehicle power systems Connect the RED harness lead with fuse to the positive side of a 5 40 volt DC power source Connect the BLACK harness lead to the negative side of the 5 40 volt DC power source The GPS 50 will drive a remote alarm or relay that requires no more than 100 milliamps of current WARNING Devices which draw current in excess of 100 milliamperes may damage your unit and will void your warranty Consult the instructions included with the remote alarm or relay for current drain information To connect to a remote alarm system Connect the BLUE harness lead to the negative side of a transistor alarm or relay switch Connect the positive side of the alarm or relay
17. 2 C 1 2 5 2 3 5 1 INDEX Course To Steer CTS 6 1 Cursor 6 1 Cyclicfield 6 5 61 D 5 5 Data entry 42 Date Time Page 4 2 Desired Track DTK 2 3 Dilution of Precision DOP Display 3 3 Distance Made Good DMG 4 4 42 E 4 2 Elapsed timer 4 4 Estimated Position Error EPE 3 2 3 4 Estimated Time Enroute ETE B 2 Event Timer Page F 2 3 Field 4 3 Filter Settings Page 4 3 21 G GOTO waypoint 1 2 Ground Speed GS 1 2 C 9 I 2 6 Installation B 2 K Key press tone 3 4 Keypad 4 5 23 L 5 2 Localdate time B 2 M Magnetic variation Magnetic Variation Page Maintenance Man overboard Manual altitude entry Map datum Map Datum Page Message banner Message Page N Navigation Navigation Menu Navigation units Nearest Waypoint Page NMEA output Normal mode Numeric field O Operating mode Operating Mode Page Output NMEA Output Page P Page Position Page Power On R Range RNG Route Catalog Page Route Review Page Routes Activating Building with AutoStore Clearing 4 5 4 5 C 10 3 9 3 3 4 7 4 7 2 5 4 1 6 7 Copying Creating Editing active route Editing storage routes s Satellite Status Page Searching the sky Self test Setup Menu Simulator mode Steer STR Sunrise Sunset Page T Time local UTC Timers Track TRK Trip Planning Page U Units Page Universal mount UTCtime V Velocity Made Good VMG w Waypoint Definitio
18. 83 are available for interfacing with other marine electronic devices see Appendix C for more information on NMEA interfaces Alternatively you may select NO OUTPUT if you do not use the interface this will help extend battery life 4 11 MAP DATUM Map Datum Select MAP DATUM PAGE The GPS 50 calculates your position based on the WGS 84 map datum If your charts or other electronic devices are created using a different datum you must set the GPS 50 map datum for consistency a position inthe WGS 84 datum coulddiffer by 1000 feet or more from one calculated using another datum The GPS 50 provides 101 standard map datums and allows you to enter your own if necessary Check the datum in the legend of your chart and the manuals of your other navigation equipment interfaced to the GPS 50 and set the map datum accordingly To select a standard map datum With the cursor under the map datum select field press MORE or the arrow keys until the desired map datum is displayed Refer to Appendix C for a list of the standard map datums To select a user map datum User Map Datum Latitude EH Y Correction mr mo p Longitude 30 Correction With the cursor under the map datum select field press MORE until USER is displayed Press ENT Enter the latitude and longitude corrections in the appropriate fields Remember if the direction E W N S is incorrect press CLR until the correct directio
19. Alphanumeric Field Cursor on Confirmation Field MORE KWST JEL aya 4o 7 B TMB 15 Numeric Field Cursor on Cyclic Field The area of the page which is underlined is called thecursor The cursor may be moved to locations on the page calledfields which allow you to enter data You will encounter four types of fields Numeric fields accept numbers For example you will enter a waypoint s latitude in a numeric field Alphanumeric fields accept numbers as well as letters For example you will enter a waypoint s name in an alphanumeric field Cyclic fields allow you to select from one of several available options For example you may select between DTK desired track BRG bearing to waypoint or CTS course to steer using a cyclic field Cyclic fields are indicated on the display by the MORE banner Confirmation fields allow you to indicate your approval For example you will be asked to confirm that you want to delete a waypoint Confirmation fields always end with a character 2 4 KEYPAD OPERATION PWR BRT The PWR BRT key is a dual function key thatcontrols unit power and panel backlighting When the unit is on pressing the PWR BRT key will turn on the panel backlighting Pressing the PWR BRT key again will turn off the backlighting To turn the unit off press and hold the PWR BRT key for three seconds until the display is blank 2 3 MSG Yn 3 GOTO MOB NAV
20. CONUS NORTH AMERICAN 1927 Alaska NORTH AMERICAN 1927 Bahamas excluding San Salvador Island NORTH AMERICAN 1927 San Salvador Island NORTH AMERICAN 1927 Canada including Newfoundland Island NORTH AMERICAN 1927 Canal Zone NORTH AMERICAN 1927 Caribbean Barbados Caicos Islands Cuba Dominican Republic Grand Cayman Jamaica Leeward Islands Turks Islands NAD27 C A NAD27 CUB NAD27 GRN NAD27 MEX NAD83 OBSERV 66 OLD EGYPT OLDHAWAI OMAN GRT BT 36 PICO NIEV PITCRN 67 RT90 S CHILE S AMER 56 PURTO RIC QATARNTL QORNOQ REUNION ROME 1940 SANTO DOS SAO BRAZ SAPR HILL SCHWARZCK S AMER 69 S ASIA SE BASE SW BASE TIMBLI 48 TOKYO TRISTN 68 NORTH AMERICAN 1927 Central America Belize Costa Rica El Salvador Guatemala Honduras Nicaragua NORTH AMERICAN 1927 Cuba NORTH AMERICAN 1927 Greenland Hayes Peninsula NORTH AMERICAN 1927 Mexico NORTH AMERICAN 1983 Alaska Canada Central America CONUS Mexico OBSERVATORIO 1966 Corvo and Flores Islands Azores OLD EGYPTIAN Egypt OLD HAWAIIAN Mean Value OMAN Oman ORDNANCE SURVEY OF GREAT BRITAIN 1936 England Isle of Man Scotland Shetland Islands Wales PICO DE LAS NIEVES Canary Islands PITCAIRN ASTRO 1967 Pitcairn Island SWEDEN PROVISIONAL SOUTH CHILEAN 1963 South Chile PROVISIONAL SOUTH AMERICAN 1956 Bolivia Chile Colombia Ecuador Guyana Peru Venezuela PUERTO RICO Puerto Rico Virgin I
21. GES NAVIGATION TERMS B 1 Definitions B 2 Course To Steer CTS INSTALLATION AND MAINTENANCE C 1 Specifications C 2 Electrical Wiring C 3 Universal Mount Installation C 4 Universal Mount Operation C 5 Battery Pack Operation C 6 Maintenance C 7 Customer Support MAP DATUMS INDEX 4 7 4 7 5 1 5 1 5 2 5 4 5 5 6 1 6 2 6 5 6 7 C 10 C 11 D 1 CHAPTER 1 INTRODUCING THE GARMIN GPS 50 1 1 CAPABILITIES The GPS 50 provides a host of powerful capabilities which were previously found only in much larger systems Performance State of the art MultiTrac receiver tracks up to eight satellites while providing high receiver sensitivity fast first fix and continuous navigation updates Portability Goes where you go onseaorland The built in simulator allows you to plan your next trip or hone your navigation skills at home or in your office Navigation Illuminated keypad and display provide the navigation information you need at a glance Store up to 250 alphanumeric waypoints and 10 reversible routes The GOTO function sets an instantaneous course to the waypoint of yourchoice The AutoStore function helps you build routes as you go A flashing Message Annunciator and an audible message tone keep you fully informed of your navigation status Personalized Configure your unit the way you like by selecting nautical units Course Deviation Indicator CDI sensitivity keypad and display features
22. GPS 50 PERSONAL NAVIGATOR OWNER S MANUAL GARMIN International Inc COMMDACA TIGA amp NAVIGATION GPS 50 Personal Navigator OWNER S MANUAL for Software Version 2 0 or above 1991 1992 GARMIN 9875 Widmer Road Lenexa KS 66215 Printed in Taiwan Allrights reserved No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying and recording for any purpose without the express written permission of GARMIN Information in this document is subject to change without notice GARMIN reserves the right to change or improve their products and to make changes inthe content without obligation to notify any person or organization of such changes or improvements October 1992 190 00015 01 Rev B PREFACE GARMIN thanks you for selecting our high performance full featured Personal Navigator The GPS 50 represents our continued commitment to provide you with a portable navigation unit that is versatile extremely accurate and easy to use We are confident you will enjoy using your unit for many years to come The GPS 50 s rugged construction and quality components offer the reliability demanded by the harshest operating environments It may be used in marine and land vehicles as well as by hunters hikers and military forces The unit may be operated portably using its own battery pack or it may use a 5 40 volt DC external pow
23. J B 558 DR Create a waypoint named DRYT which will be located in the Dry Tortugas area of the Gulf of Mexico Move the cursor back under the waypoint name field Enter the waypoint name DRYT latitude wi T neon N24 38 00 and longitude wos2e DRYT POSN 55 07 Piran 8255 5 Y Create a waypoint named FMYR which is the name for Fort Myers Florida Move the cursor back under the waypoint name field Enter the waypoint name FMYR WPT latitude N26 35 17 and longitude FMYR POSN W081 51 81 Saag Y Nowthat the sample waypoints are in memory create the sample route using these waypoints Create the sample route Press RTE until the Route Catalog Page is displayed Press MORE untilthe route 1 is displayed NOTE This example assumes route 1 is empty Press ENT You have just selected the Route Review Page for route 1 Notice 3 SS that the route does not contain any a er waypoints LO indicates leg O is anaa ase a displayed L ork i Enter the waypoint name FMYR followed by the ENT key You have just entered Ft Myers as the waypoint from which your RNG voyage will start m m z z ase A Li rk NM Enter DRYT as the second waypoint of the route IR YT m RNG LE Fk DR Enter KWST as the third waypoint of the K IST route This is the waypoint where your a W aana voyage will end a NM L3 rk If you haven t alr
24. POWER Input Alkaline battery pack 4 AA size Consumption ENVIRONMENTAL Rechargeable battery pack 12 or 24 volt DC with power cable 5 40 VDC 115 or 230 volt AC with battery charger 1 1 watts in Normal mode without backlighting Temperature 15 C to 70 C 5 F to 158 F operating 40 C to 70 C 40 F to 158 F storage Humidity 95 non condensing PERFORMANCE Receiver MultiTrac tracking up to 8 satellites Acquisition Time 2 minutes 2D typical 2 5 minutes 3D 15 seconds Warm Start with ephemeris Update Rate Once per second continuously C 1 Accuracy Position 15 meters 49 ft RMS Velocity 0 1 knots RMS steady state Dynamics 90 knots velocity 3g dynamics INTERFACES NMEA 0180 NMEA 0182 NMEA 0183 Version 1 5 December 1987 Approved sentences GPBWC GPGLL GPRMB GPRMC GPROO GPWPL GPXTE Proprietary sentences PGRMA Transmission rate GPBWC GPGLL GPRMB GPRMC GPXTE and PGRMA transmitted once every two seconds GPROO transmitted once every of route waypoints 1 2 seconds e g if there are two route waypoints this sentence will be transmitted once every six seconds GPWPL transmitted of route waypoints times in of route waypoints 1 2 seconds e g if there are two route waypoints this sentence will be transmitted twice every six seconds NOTES All specifications are subject to change without notice Subject to accuracy degradation to 100m 2DRMS
25. and the message CDI ALARM if your craft has deviated from course beyond the limit you set This can be useful while navigating a narrow channel Todisarm the alarm enter zero for the distance 4 4 BACKLIGHTING TIMEOUT m TIMEDUT ight Timeou 20 SEE BACKLIGHTING PAGE The GPS 50 will automatically turn the backlighting off after a specified number of seconds backlighting is restored by pressing any key If you are using battery power this feature will help you extend battery life To change the timeout period Withthe cursor under the light timeout period enter a non zero value Todisable the backlighting timeout simply enter zero this means the backlighting will never turn off while the unit is operating 4 5 AUDIO SETTINGS AUDIO SETUP PAGE The Audio Setup Page allows you to select the characteristics of the audio tones To select audio tones With the cursor under the tone select field press MORE until the desired tone setting is selected Select ALL TONES to turn on both message and keypress feedback MSG TONE to turn on message tone only or NO TONES to turn off both 4 6 NAVIGATION UNITS Units Select UNITS PAGE The GPS 50 allows you to select the distance speed and altitude units that best suit your needs To select navigation units Press MORE to select the desired combination of distance speed and altitude units You may select from Nautical
26. at head screws are recommended To install universal mount on a surface F CRADLE SPECIAL SCREW WAVE WASHER COINSLOT SCREW CONNECTOR P LATE CABLE CABLE SCREW POWER DATA TENT SPRING DETENT PIN E RING L J AUXILIARY VIEW N SPECIAL SCREW C 5 Remove the E ring from the special screw under the base using a pair of pliers Remove the lever Unscrew the special screw and remove it from the base The base lever detent pin detent spring plastic spacer and wave washer may be set aside these parts are not used for surface installation Remove the screws which mount the power data cable and remove the cable Unscrew and remove the coinslot screw and remove the cradle Drill an oblong hole in the mounting surface to allow clearance for the power data cable connector Mount the connector plate to the dash using appropriate screws 8 flat head screws are recommended Slide the cradle onto the connector plate and install the coinslot screw Install the power data cable To adjust the universal mount C 6 The universal mount is designed to allow the GPS 50 to be installed either with or without the battery pack attached To adjust the universal mount to accept the GPS 50 with the battery pack attached Loosen the coins
27. aypoint name which does not existis entered the error tone will sound As an alternative the GPS 50 provides a scanning feature that allows you to select a waypoint by quickly scanning through the entire list of waypoints in alphabetical order numbers are ordered before the letters of the alphabet To select a waypoint by scanning With the cursor under a waypoint name field press WPT The first alphanumeric waypoint will be displayed in the waypoint field Each time the Waypoint Definition Page is selected the scanning mode will automatically be activated with the first alphanumeric waypoint displayed There is no need to press WPT Use the arrow keys to scan through the entire list of waypoints With the desired waypoint shown press ENT to select the waypoint press CLR to cancel the scanning operation at any time Variable rate scanning is implemented to allow you to quickly go through the list When the arrow keys are pressed briefly you step through the waypoints one at atime As the arrow keys are held for a longer period of time the waypoint list scrolls more rapidly the longer the arrow keys are held the larger the step through the list 3 7 NEAREST WAYPOINTS An important feature of the GPS 50 is the ability to display up to nine waypoints nearest to your position but not further than 100 nautical miles In an emergency you may use the nearest waypoint feature to find the closest point of safety in your ar
28. charts etc For safety always resolve any discrepancies before continuing navigation NOTE This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation CHAPTER TABLE OF CONTENTS BASIC FEATURES INTRODUCING THE GARMIN GPS 50 1 1 Capabilities 1 2 Operations GETTING STARTED 2 1 Front Panel 2 2 Banners 2 3 Cursor and Fields 2 4 Keypad Operation 2 5 Entering Data 2 6 Viewing Messages 2 7 Operating Modes BASIC OPERATION 3 1 Power On 3 2 Satellite Status 3 3 Present Position 3 4 AutoStore 3 5 CDI and Navigation Summary 3 6 Waypoints 3 7 Nearest Waypoints 3 8 Navigate to a Waypoint 3 9 Man Overboard 3 10 Sample Trip UNIT CUSTOMIZATION 4 1 Setup Menu 4 2 Operating Mode 4 3 User Selectable Alarms 4 4 Backlighting Timeout 4 5 Audio Settings 4 6 Navigation Units 4 7 CDI Scale 4 8 Magnetic Variation PAGE 4 9 Filter Settings 4 10 Output 4 11 Map Datum ADVANCED FEATURES NAVIGATION PLANNING 5 1 Navigation Menu 5 2 Date and Time 5 3 Event Timer 5 4 Trip Planning 5 5 Sunrise Sunset 5 6 Alarm Clock ROUTES 6 1 Navigating Using Routes 6 2 Route Catalog 6 3 Editing Routes 6 4 Activating Routes 6 5 Building Routes Using AutoStore SAMPLE SIMULATED TRIP APPENDICES MESSA
29. down It does not generate amessage but simply measures time from the point at which it was started To start the elapsed timer With the cursor under the time field enter the start time in hours minutes and seconds you may start or restart the elapsed timer from anon zero time With the cursor under the selection field press MORE until COUNT UP is displayed Press ENT The timer will start counting up To stop the elapsed timer With the cursor under the selection field press MORE until STOP is displayed Press ENT The elapsed timer will freeze at its last value 5 4 TRIP PLANNING From NAV To Waypoint KWOTINGRUT waypoint Desired L u i 4 H 5 g ef Distance Track be I J4 u Estimated Time 3 Enroute TRIP PLANNING PAGE The Trip Planning Page allows you to calculate the distance desired track and time requirement between any two waypoints To perform trip planning Enter the from waypoint If you wish to use your present position leave it blank Enter the to waypoint If you wish to use your present position leave it blank The GPS 50 will display the great circle distance and bearing between the two geographical points In addition the time requirement will be displayed based on your present speed 5 5 SUNRISE SUNSET NAV SUN MIAM F arom BH J I J Sunrise Time V3 ihe bs Sunset Time 3D SUNRISE SUNSET PAGE The Sunrise Sunset Pa
30. e lighter adapter cable may be used to power the unit in vehicle applications 1 2 CHAPTER 2 GETTING STARTED 2 1 FRONT PANEL PORT FISH eg ais ov 223 OOA GOO OOOOE GOOO E The front panel consists of a 20 key keypad and a LCD display which includes three lines of information and various banners Both the display and keypad are illuminated for operating in darkness 2 2 BANNERS Information displayed on the LCD is commonly referred to as a page A page consists of alphanumeric information and banners Banners illustrated below are used to indicate the type of page navigation units and data displayed see Appendix B They also indicate navigation fix type satellite tracking and provide user prompting UOlDBIADN sezy 9 0S Buuinboy ag uonobnoy p ljo lloo Buieg xj oN Bujuoyoay pp q l az jog Sll 16S anoH wy noH S lIN ouy yd ae az ODV viva 3S09 S9M Pee P MOSA S aus Tsuna 121 1 3 uononu sul a l ae al sN SS 33 NL yal OW eg Spey Seinen Wy y S JO OWO Y aN 8940S AWN pnoy 7 AA a N WG ONY wlS SIO 939 X10 Se 2 I eet uynos UON poog ppNW edupjsiq upy 44614 4427 puowwog 1387S IW l4 198 5_ 0 esunoo AYOW SW OSV 13S 3l LdM AVN buup g Joda pasaq MIA OL 1lduuoid doypiaunuuy bpss N e42oysolnv dnjes ynoy julodADM uoo oN peApidsiq abpg Jo d 2 2 2 3 CURSOR AND FIELDS
31. e longitude Your position is now initialized to Fort Myers Florida Now you need to create the waypoints used in the sample trip Create waypoints Press WPT to display the Waypoint Definition Page Create a waypoint named KWST the Key West area of South Florida With the cursor under the waypoint name oy pn 5 ki enter KWST Begin by pressing the 4 key As UN which also has a K printed on it The jn letter K is displayed Press the 8 key ae Sk as sa sak s which also has a W printed on it The letter W is displayed Press the 7 key lt lt lt lt lt lt which also has an S printed on it followed by the left or right arrow key until MST PO S is displayed Press the 7 key which also has a T printed on it The letter T is displayed When finished press the ENT key Thecursorwillmoveunderthe a a a msm x view select field pe Press ENT The cursor will move under the latitude field OS POSN N e A 4 a sr A a Wea a a a 41514 4 DR Enter the latitude of Key West Florida m N24 33 34 by pressing 2 4 3 3 3 4 Ki AS T POSN Press ENT when you are finished The cursor will automatically move under e 4 3 3 3 a longitude Enter the longitude of Key West Florida Yis T pn ON W081 45 58 by pressing 0 8 1 4 5 5 8 Press ENT when you are finished You have just created the waypoint KWST 44 3 3
32. e time at 0 degrees longitude which passes through the city of Greenwich England The GPS 50 automatically corrects the UTC date and time with information received from the satellites Due to the irregular nature of time zones the GPS 50 does not attempt to correct your local time when you pass from one time zone to another To update your local date and time Press MORE until LCL is displayed in the time selection field With the cursor under the date field enter your local date in year month day format With the cursor under the time field enter your local time in 24 hour format 5 3 EVENT TIMER Timer select Time EVENT TIMER PAGE The GPS 50 features a timer which can be used as either an elapsed timer or count down timer To set the count down timer Withthecursor under the time field enter the count down time in hours minutes and seconds With the cursor under the selection field press MORE until COUNT DN is displayed Press ENT The timer will start counting down When the timer reaches zero you will be informed with the message TIMER EXP and the timer will begin to count up showing you the elapsed time since the timer has expired To stop the count down timer With the cursor under the selection field press MORE until STOP is displayed Press ENT The count down timer will freeze at its last value The elapsed timer counts up instead of counting
33. ea Rank Waypoint Name won NRI FMYR Bearing From Range From BRG RNG Present Position P y p VY z Present Position i I 3 Estimated Time 3D Enroute NEAREST WAYPOINT PAGE The Nearest Waypoint Page may be displayed by pressing the WPT key It provides the waypoint name and bearing range estimated time enroute from present position Entire lists of your nearest waypoints indicated by NR1 through NR9 may be viewed by pressing the MORE key while the cursor is under the waypoint name 3 8 NAVIGATE TO A WAYPOINT The GOTO function allows you to quickly set a course from your position to any waypoint GOTO Waypoint Desired Track Range Estimated Time Enroute ACTIVE ROUTE PAGE GOTO MODE To activate the GOTO function Press GOTO The Active Route Page will be displayed with the cursor under the GOTO waypoint field If the GPS 50 is currently navigating to a waypoint that waypoint will be offered as the default GOTO waypoint Confirm the default GOTO waypoint by pressing the ENT key this will re center CDI on the CDI page or enter the desired GOTO waypoint name The CDI Page will be displayed Alternatively the GOTO function may be quickly activated from any page e g the Nearest Waypoint Page by placing the cursor under the desired waypoint name and pressing the GOTO key The Active Route Page will be displayed with the cursor under the GOTO waypoint name The GOTO function will be activated when t
34. ea of application ADINDAN AFGOOYE AIN ELABD ANNA1ASTR ARC 1950 ARC 1960 ASCNSN IS ASTR BECN ASTRSOROL ASTRO DOS ASTRO STN ASTRLN 66 ASTRLN 84 BELLEVUE BERMUDA BOGOTA OB CAMPO INC CANTON 66 CAPE CAP CNVRL CARTHAGE CHATHM 71 CHUA ASTR CREGO ALG DJAKARTA DOS 1968 EASTER IS EUROPE 50 ADINDAN Ethiopia Mali Senegal Sudan AFGOOYE Somalia AIN EL ABD 1970 Bahrain Island Saudi Arabia ANNA 1 ASTRO 1965 Cocos Islands ARC 1950 Botswana Lesotho Malawi Swaziland Zaire Zambia Zimbabwe ARC 1960 Kenya Tanzania ASCENSION ISLAND 1958 Ascension Island ASTRO BEACON E Iwo Jima Island ASTRO B4 SOROL ATOLL Tern Island ASTRO DOS 71 4 St Helena Island ASTRONOMIC STATION 1952 Marcus Island AUSTRALIAN GEODETIC 1966 Australia Tasmania Island AUSTRALIAN GEODETIC 1984 Australia Tasmania Island BELLEVUE IGN Efate and Erromango Islands BERMUDA 1957 Bermuda Islands BOGOTA OBSERVATORY Colombia CAMPO INCHAUSPE Argentina CANTON ASTRO 1966 Phoenix Islands CAPE South Africa CAPE CANAVERAL Florida Bahama Islands CARTHAGE Tunisia CHATHAM 1971 Chatham Island New Zealand CHUA ASTRO Paraguay CORREGO ALEGRE Brazil DJAKARTA BATAVIA Sumatra Island Indonesia DOS 1968 Gizo Island New Georgia Islands EASTER ISLAND 1967 Easter Island EUROPEAN 1950 Austria Belgium Denmark Finland France Germany Gibraltar Greece Italy Luxembourg Netherlands N
35. eady guessed you have just created a route that will take you from Fort Myersto the Dry Tortugas and onto Key West You may review the route leg information including desired track and range by pressing the left arrow key to scroll through the route waypoints Activate the sample route MORE Press RTE to display the Route Catalog My Br WS T Page again es qu Press ENT With the cursor under ACTIVATE RTE press ENT to activate the sample route MYR IRYT The Active Route Page will be displayed 5 I I J q k AL BSB The sample route is now active This page displays the waypoint you are going from FMYR andthe waypoint you are going to DRYT on line one as well as desired track distance and time information on lines two and three Examine navigation information Press NAV to display the CDI Page The page will indicate CDI bearing range track and speed information NAV f 2 im B TRK 2 GS m zio So Press an arrow key to place the cursor under line one Press MORE to viewthe active leg Press the MORE key again to view the CDI Usethe arrow keys to move the cursor under the fields on lines two and three Press MORE to select a different display option Experiment with your GPS 50 Nowthat youhave started on your fantasy trip to the Dry Tortugas why don t you take some time to experiment with the GPS 50 Press each page selection key to become familiar w
36. ed GARMIN is located 109 11 8 nautical miles from the initial position Just forfun let s goto GARMIN Turn on your GPS 50 The power on notices will be displayed followed by the Satellite Status Page as illustrated below SET ub j u 3 22 gb TME _ ACQ The GPS 50 is ready to accept your commands Select the simulator mode Press SET until the Set Menuis displayed Press MORE until OP MODE is displayed Press ENT to display the Operating Mode Page Press MORE until SIMULATR is displayed then press the ENT key You have just selected simulator mode Set the simulation speed With the cursor under the ground speed field press 0 1 5 followed by the ENT key to indicate 15 knots you may enter any speed you wish up to 90 knots The simulation speed is now set GOTO GARMIN PressGOTO The Active Route Page will be displayed with the cursor under the GOTO waypoint name 3 10 Withthe cursor under the GOTO waypoint name enter the waypoint name GRMN Begin by pressing the 3 key which also has a G printed on it The letter H is displayed Press the left or right arrow key until G is displayed Press the 6 key followed by the left or right arrow key until R isdisplayed Press the 5 key followed by the left or right arrow key until M is s ad displayed Press the 5key The letter N E w is displayed When finished press the
37. er on notices will be displayed followed by the Satellite Status Page as illustrated below SET W 6 FT rr gh TME ACQ The GPS 50 is ready to accept your commands Select the simulator mode Press SET until the Set Menuis displayed Press MORE until OP MODE is displayed Press ENT to display the Operating Mode Page Press MORE until SIMULATR is displayed then press ENT You have just selected the simulator mode Set the simulation speed With the cursor under the speed field press 0 1 5 followed by the ENT key to indicate 15 knots you may enter any speed you wish up to 90 knots The speed is now set Since your trip starts at Ft Myers you need to set your GPS 50 position to that location Set your GPS 50 position Press NAV until the Position Page is R T IBBIr displayed NOTE The position will be L K changing by your entered speed N 3 gy 2 I5000o Press an arrow key to move the cursor under the latitude _agogg2 950000 Press CLR until the N hemispheric n T IPBIr designation is displayed then press the 2 E 6 3 5 1 7 keys to enter N26 35 17 Press ENT to complete the latitude The 2 3 5 i L cursor will move to the longitude o3500 0 DR Press CLR until the W hemispheric designation is displayed then press the 0 8 1 5 1 8 1 keys to enter W081 51 81 Press ENT to complete th
38. er source for fixed mounted applications You can even use a 115 or 230 volt battery charger for planning trips at home This manual and accompanying quick reference card provide complete information on safely operating the GPS 50 to its full potential Two exciting practice voyages have been planned for you to practice your navigation skills using the built in simulator Afterwards try a trip of your own to realize the value of the GPS 50 as your Personal Navigator If you have any questions or comments our Customer Support Department is eager to serve you GARMIN is fully committed to your satisfaction as a customer GARMIN International Inc 9875 Widmer Road Lenexa KS 66215 CAUTION The GPS system is operated by the government of the United States which is solely responsible for its accuracy and maintenance The system is under development and is subject to changes which could affect the accuracy and performance of all GPS equipment Although the GPS 50 is a precision electronic NAVigation AID NAVAID any NAVAID can be misused or misinterpreted and therefore become unsafe Use the GPS 50 at your own risk To reduce the risk carefully review and understand all aspects of this Owner s Manual and thoroughly practice operation using the simulator mode prior to actual use When in actual use carefully compare indications from the GPS 50 to all available navigation sources including the information from other NAVAIDs visual sightings
39. ge will display sunrise and sunset times for any waypoint This can be helpful if you wish to be at your favorite fishing spot at the crack of dawn or if you wish to return home before dark To calculate sunrise and sunset times Enter the desired waypoint name If you wish to use your present position leave it blank The GPS 50 will display the sunrise and sunset times for the current date at the waypoint The sunrise and sunset times will be displayed in local or UTC time based on your selection on the Date Time Page see Section 5 2 5 6 ALARM CLOCK Alarm Switch ALARM ON g4 5 Alarm Time l Current Time 1586 13 ALARM CLOCK PAGE The Alarm Clock Page on the GPS 50 allows you to concentrate on other important tasks while the GPS 50 watches the clock for you To set the alarm clock Press MORE to select ON for the alarm clock Enter the desired alarm time in 24 hour format line three displays the current time Enter local or UTC time based on your selection on the Date Time Page see Section 5 2 When the alarm time has been reached the GPS 50 will inform you with the message ALARM CLK To cancel the alarm clock Press MORE to select OFF for the alarm clock CHAPTER 6 ROUTES 6 1 NAVIGATING USING ROUTES PNT BUO9 BU07 Active to Waypoint Active Leg HOME Active from Waypoint The GPS 50 offers a route navigation feature for you to navigate along a
40. he ENT key is pressed To cancel the GOTO function Press GOTO Press CLR the GOTO waypoint name will become blank Press ENT The GPS 50 will start to navigate using the active route if it has been programmed see Chapter 6 Otherwise the GPS 50 will cease the computation of all waypoint navigation data 3 8 3 9 MAN OVERBOARD The Man Overboard function allows you to set an instantaneous course to a captured position providing rapid response to an emergency situation Man Overboard Waypoint RTE raTrTnm MM Uulu TMu Desired o a NT u Range Track 5 B 3 Estimated Time Enroute ACTIVE ROUTE PAGE MAN OVERBOARD MODE To activate the Man Overboard function Press MOB twice The Active Route Page will be displayed and the present position will be captured in a waypoint named MOB Press ENT to navigate to the Man Overboard waypoint The CDI Page with navigation information to MOB will be displayed 3 10 SAMPLE TRIP Now that you have gained a basic understanding of the GPS 50 you are ready to embark on a sample trip The sample illustrations in this section assume that the factory default settings have not been changed If you have changed these parameters the unit may display slightly different data than presented here Your GPS 50 is factory initialized with a position of N39 W095 A waypoint named GRMN located at GARMIN s Lenexa Kansas facilities is also provid
41. horized GARMIN service center as soon as possible ALARM CLK The alarm clock time has been reached ANCHR ALR Your craft has drifted outside the anchor drag alarm radius set on the Alarm Page APCH You are less than one minute from reaching the indicated waypoint or your craft has entered the arrival alarm circle for the indicated waypoint ARIV Your craft has entered the arrival alarm circle for the indicated waypoint BATT LOW The battery pack is low on power AA batteries should be replaced or the rechargeable battery pack should be recharged for continued operation CDI ALARM Your course deviation has exceeded the limit you specified on the Alarm Page DATA LOST Stored user data including waypoints routes and satellite orbital data has been lost due to a low memory battery EXST You have renamed the waypoint on the AutoStore Page or Waypoint Definition Page with a name that already exists in memory Enter a waypoint name that does not exist HIGH EPE The accuracy of the GPS 50 position is degraded beyond 500 meters due to satellite geometry or data quality Additional cross checking should be performed by the user to verify the integrity of the GPS 50 position MEM BATT The battery that sustains user memory is low and should be replaced by an authorized GARMIN service center as soon as possible Failure to do so may result in loss of stored data including all waypoints and routes MEM FULL The way
42. ie B D Satellite Status Page Setup Menu Message Page 4 1 SETUP MENU Menu Select SETUP MENU The Setup Menu displays the SET MENU title to let you access the underlying functions To select a function from the menu press the MORE key until the desired function is displayed then press the ENT key The available function selections are OP MODE ALARMS BACKLGHT AUDIO UNITS CDI MAG VAR FILTERS OUTPUT and MAP DATM As you change setup parameters keep in mind the changes you make become effective immediately if the option does not have a Otherwise if the option has a you must press the ENT key to confirm it before the change becomes effective 4 2 OPERATING MODE Mode Select Speed OPERATING MODE PAGE The GPS 50 provides you with the capability to select from three modes which will allow you to operate your unit in the manner which best suits your needs To select the operating mode With the cursor under the mode select field press MORE until the desired operating mode is displayed Normal Battery Saver or Simulator mode as described in Section 2 7 Press ENT The GPS 50 will now transition to the selected operating mode NOTE Changing modes will cause amomentary interruption in navigation while the GPS 50 acquires satellites and recomputes navigation information To enter simulation speed
43. irection and distance L indicates you should steer to the left R indicates you should steer to the right The distance indicates how far you are off course B 2 COURSE TO STEER CTS Course To Steer is a GARMIN exclusive that recommends an optimal direction to steer that will guide you to the course and proceed efficiently along your route WPT 2 lt gt WPT 1 As an example suppose you activate the route illustrated above The GPS 50 chooses the closest leg with a desired track of 45 degrees but your position happens to be two nautical miles off course The unit will automatically compute the optimal course to steer whichis 15 inthis example Press the NAV key until the CDI Page is displayed then select CTS on line two and TRN online three Turn your craft according to the TRN direction until the TRN angle reaches zero Continue to follow the TRN guidance thus matching your track TRK with the recommended course to steer PORT Juny hig goo TRN 3 Bz 3D As you approach the course CTS will slowly change and once on course will be identical to the desired track APPENDIX C INSTALLATION AND MAINTENANCE C 1 SPECIFICATIONS GPS 50 SPECIFICATIONS PHYSICAL Case Waterproof Size Portable 3 23 w x 6 26 h x 1 46 d 82mm x 159mm x 37mm Fixed 3 23 w x 4 87 h x 1 46 d 82mm x 124mm x 37mm Weight 14 ounces 0 4 kg without battery pack 19 5 ounces 0 55 with battery pack
44. ith available pages Practice using the cyclic fields to display new information Examine the Active Route Page as the simulation progresses If you want change the simulation speed As you progress through the simulation the GPS 50 will alert you with a message when you are within one minute of reaching the waypoint DRYT When passing DRYT the GPS 50 will automatically sequence to the next waypoint which is KWST At some point during the simulation you may wish to try the GOTO function Suppose severe weather in the Dry Tortugas area was reported over your VHF com You may wish to shorten your trip by heading directly to Key West Florida Simply press GOTO The Active Route Page will be displayed Enter KWST The GPS 50 will set an instantaneous course and you are on your way to Key West APPENDIX A MESSAGES The GPS 50 uses the Message Page to communicate important information to you Some messages are advisory in nature others are warnings that may require your intervention This appendix provides a complete list of GPS 50 messages and their meanings Please pay careful attention to all messages ACTV WPT An attempt has been made to modify the position of the active to or active from waypoint The GPS 50 will not allow the modifications ADJST OSC The GPS 50 has detected excessive driftin its internal crystal oscillator which may result in longer acquisition time The unit should be taken to an aut
45. ll the characters are entered The GPS 50 features a keypad feedback tone which will sound each time you press a key If you enter data which is not appropriate for the field the feedback tone will quickly sound three times indicating an error The keypad feedback tone can be turned off if you wish see Section 4 5 2 6 VIEWING MESSAGES From time to time the GPS 50 will use a message to tell you of conditions that need your attention When the GPS 50 has a new message for you the MSG banner will flash When this occurs press the MSG key to view new message s Continue to press the MSG key until the page you were viewing prior to pressing the MSG key is displayed While the MSG banner is flashing the GPS 50 will also generate an audible tone to alert you of the message if your unit is connected to an external alarm it will also be activated Messages that demand immediate attention such as an arrival alarm generate a quick tone that will not stop until you view the message All other messages generate a slow tone that will cease after 15 seconds The message tone may be turned off if you wish see Section 4 5 2 5 Important messages will remain on the Message Page after being viewed If this occurs the MSG banner will be in view but will not flash if no messages exist the MSG banner will not be visible To review these messages press the MSG key until the MESSAGES title is displayed Then press the MORE key until the
46. lot screw Raise the connector plate to its tallest position Tighten the coinslot screw When adjusted properly the coinslot screw should fit completely into the counterbore in the cradle so that all surfaces are flush C 4 UNIVERSAL MOUNT OPERATION The universal mount has been designed for easy insertion and removal of your GPS 50 if you wish to use the unit in another boat or vehicle plan at home or prevent theft To insert the GPS 50 into the universal mount PIVOT POINT I Tilt the top of the GPS 50 into the universal mount as shown Engage the slot in the top of the GPS 50 into the raised bump in the universal mount Rotate the bottom of the GPS 50 into the universal mount until the unit latches securely into place C 7 Connectthe antennaor antennacable No other electrical connections are required all power and data connections are made through the 6 pin connector installed in the universal mount To remove the GPS 50 from the universal mount PIVOT POINTI i DEPRESS S TAB Disconnect the antenna or antenna cable mg H Apply enough force tothe release tab to allow the unit to pass as shown above Pull the bottom of the GPS 50 out then rotate the top d
47. n Page Waypoints Wiring 5 1 5 2 B 2 5 4 4 4 5 1 3 6 C 3 COMVDAICATION amp AAVIGAN ON GARMIN International Inc 9875 Widmer Road Lenexa KS 66215 1 800 800 1020 913 599 1515 190 00015 01 Rev B
48. n is displayed then enter the numeric value CHAPTER 5 NAVIGATION PLANNING The GPS 50 provides a menu page under the NAV key which allows you to select from a menu of time and planning functions You may cycle through the Navigation Pages by pressing the NAV key repeatedly until the desired page is displayed NAV A ALT 18 SF 2M PBU NI fev ihe Brian CDI Page Position Page Navigation Menu 5 1 NAVIGATION MENU Menu Select NAVIGATION MENU The Navigation Menu displays the NAV MENU title to let you access the underlying functions To select a function from the menu press the MORE key until the desired function is displayed then press the ENT key The available function selections are DATE TIME current date time TIMER count down elapsed timer TRIP PLN trip planning SUN CALC sunrise sunset time calculation and ALRM CLK alarm clock 5 2 DATE AND TIME T I M E l r I Local UTC Select 92 0 LiB ae i 4g B S 4 Time DATE TIME PAGE The Date Time Page displays the date and time in either UTC or local format In addition the format you select on this page is used for time displays on other pages To change the time display Press MORE to select either LCL local or UTC The GPS 50 will keep track of local as well as UTC time UTC which is essentially the same as Greenwich Mean Time GMT does not change with local time zones It is th
49. on terms used in this manual WPT 1 Velocity timeterms GS VMG ETE Ground speed GS is the speed measured relative to the ground also known as velocity over ground VOG Velocity made good VMG is velocity in the direction of the desired course It is the speed at which you are closing on the active to waypoint Estimated time enroute ETE is the time it will take to reach the active to waypoint based on VMG Direction terms DTK BRG CTS CMG TRK TRN Desired track DTK is the course between the from and to waypoints Bearing BRG is the direction from your position to the active to waypoint Course to steer CTS is the recommended direction to steer in order to reduce cross track error and stay on course see Section B 2 for an example using CTS Course made good CMG is the bearing from the active from waypoint to your position Track TRK is the direction of movement relative to the ground Turn instruction TRN is the difference between BRG or CTS whichever you have displayed and TRK L indicates you should turn to the left R indicate you should turn to the right The degrees indicate the angle you are off course Distance terms RNG DMG STR Range RNGisthe great circle distance from your position to the to waypoint Distance made good DMG is the distance from the active from waypoint to your position Steer d
50. or under the storage select field press MORE until the desired route is displayed e g Route 5 as illustrated below ASTO MORE tad RI 260369 B r in12 This route will be the default storage selection for subsequent AutoStore operations until it is changed or the route becomes full Withthe desired route selected press ENT The AutoStore waypoint will be stored in the waypoint memory and appended to the selected route When you are ready to return use the Route Catalog Page to activate the route you created in reverse order The GPS 50 will automatically guide you back to your destination by passing over the waypoints you created As an added benefit you now have a route that will take you back to your fishing spot at any time CHAPTER 7 SAMPLE SIMULATED TRIP Now that you have gained a good understanding of the GPS 50 advanced features you are ready to embark on a sample route navigation trip The sample illustrations in this chapter assume that the factory default settings have not been changed If youhave changed these parameters the unit may display slightly different data than presented here IA P pa ia a aht Abe te b La Etti phan e tas reah oe H ee cite ae ath a _ Adha we U A 11 ifs DRYT 28299 i KWST Bed Fo You are planning a trip from Ft Myers Florida to the Dry Tortugas and then on to Key West Florida Turn on your GPS 50 The pow
51. orway Portugal Spain Sweden Switzerland D 1 EUROPE 79 FIN HYFRD GANDAJIKA GEOD 49 GUAM 1963 GUX ASTRO HJORSY 55 HONG KONG INDN TLND INDN BLDS IRELND 65 ISTS ASTR JHNSTN IS KANDAWALA KERGLN IS KERTAU 48 LC5 ASTRO LIBRIA 64 LUZN PHLP LUZN MNDN MAHE 1971 MARCO AST MASSAWA MERCHICH MIDWAY 61 MINNA NHRN MSRH NHRN UAE NHRN SADI NAPARIMA NAD27 CNS NAD27 ALA NAD27 BHM NAD27 SSI NAD27 CAN NAD27 C Z NAD27 CAR EUROPEAN 1979 Austria Finland Netherlands Norway Spain Sweden Switzerland FINLAND HAYFORD 1910 Finland GANDAJIKA BASE Republic of Maldives GEODETIC DATUM 1949 New Zealand GUAM 1963 Guam Island GUX 1 ASTRO Guadalcanal Island HJORSEY 1955 Iceland HONG KONG 1963 Hong Kong INDIAN Thailand Vietnam INDIAN Bangladesh India Nepal IRELAND 1965 Ireland ISTS O73 ASTRO 1969 Diego Garcia JOHNSTON ISLAND 1961 Johnston Island KANDAWALA Sri Lanka KERGUELEN ISLAND Kerguelen Island KERTAU 1948 West Malaysia Singapore L C 5 ASTRO Cayman Brac Island LIBERIA 1964 Liberia LUZON Phillippines excluding Mindanao Island LUZON Mindanao Island MAHE 1971 Mahe Island MARCO ASTRO Salvage Islands MASSAWA Eritrea Ethiopia MERCHICH Morocco MIDWAY ASTRO 1961 Midway Island MINNA Nigeria NAHRWAN Masirah Island Oman NAHRWAN United Arab Emirates NAHRWAN Saudi Arabia NAPARIMA BWI Trinidad and Tobago NORTH AMERICAN 1927 Mean Value
52. our unit Damage to the case may occur which is not covered by your warranty The waypoints routes custom settings and other data stored inthe GPS 50 are maintained by an internal battery These data will not be lost even if you remove the AA or rechargeable battery pack for separate storage The C 10 internal memory battery should typically last three to five years If the GPS 50 detects a low memory battery you will be informed with the message MEM BATT You should return your unit to an authorized GARMIN service center as soon as possible for service Failure to do so may result in loss of data each time you turn your unit off indicated by the message DATA LOST Your GPS 50 contains a highly accurate crystal oscillator which may drift after many years of operation If the unit detects excessive oscillator drift you will be informed with the message ADJST OSC You should return your unit to an authorized GARMIN service center as soon as possible Failure to do so may result in degraded acquisition performance C 7 CUSTOMER SUPPORT Should you require additional assistance please call our Customer Support Department Customers inthe continental United States may use our toll free number 1 800 800 1020 Customers outside the continental United States may call 1 913 599 1515 APPENDIX D MAP DATUMS The following is a list of the GPS 50 map datum selections and the corresponding map datum name including the ar
53. outes are activated using the Route Catalog Page You may activate any route in the displayed order or in reverse order NOTE When a new route is activated the previous contents of route A will be overwritten If you wish to save route A be sure to copy it to an empty route first To activate a route Select the desired route on the Route Catalog Page and press ENT If you wish to activate the route in the displayed order press MORE until ACTIVATE is displayed then press ENT If you wish to activate the route in reverse order press MORE until INVERT is displayed then press ENT 6 5 Immediately after activating a route the Active Route Page will be displayed This page displays the leg number L1 to L8 meaning legs 1 through 8 of the selected route or AL meaning the active leg the two waypoints composing the leg the desired track between the two waypoints and the enroute distance and time from your present position to the to waypoint Notice the AL in the above illustration This indicates the displayed leg is the active leg where FMYR is the active from waypoint and KWST is the active to waypoint NOTE When activating a route check the active leg to be sure you agree with the selection If not use the GOTO function to select the active to waypoint you desire You may view additional route legs by pressing the left or right arrow key while the cursor is under the
54. ownward and out To adjust the universal mount angle Loosen the mount by turning the lever counter clockwise Rotate and or tilt the unit to the desired position Tighten the lever C 8 C 5 BATTERY PACK OPERATION The GPS 50 is supplied with a sealed 4 cell alkaline battery pack The battery pack must be removed from the unit in order to replace the cells To remove the battery pack DEPRESS TAB Push down on the spring tab on the right side of the battery pack Pull the battery pack off the right side of the unit C 9 To replace the alkaline batteries GRIP HERE GRIP HERE Grip the battery pack around the outside edge not the bottom Push the top of the battery pack against the edge of a hard surface which will not mar the plastic The outer sleeve will slide off the cage revealing the batteries inside Replace the batteries observing the polarity diagram engraved in the plastic Slide the sleeve over the cage until it snaps into place taking care that you do not tear the gaskets which provide the battery pack seal C 6 MAINTENANCE The GPS 50 is constructed of high quality material and should not require user maintenance Please refer any repairs to an authorized GARMIN service center The unit contains no user serviceable parts do not attempt repairs yourself Never allowgasoline or solvents to come into contact with y
55. point memory is full You should delete unused waypoints to make room for new waypoints NO EMP RT There are no empty routes available into which another route may be copied The GPS 50 will not allow you to copy a route to a non empty route POOR CVRG The GPS 50 cannot acquire sufficient satellites necessary to provide navigation RCVR FAIL The GPS 50 has detected a failure in the receiver hardware If the message persists the GPS 50 is unusable and should be taken to an authorized GARMIN service center RE INIT The GPS 50 is unable to compute a position Initialize the position on the Position Page to within 1000 nautical miles of your actual position ROM FAILD The GPS 50 has detected a failure in its permanent memory If this message occurs the unit is unusable and should be taken to an authorized GARMIN service center ROUTE WPT An attempt has been made to delete a waypoint which is a member of one or more routes You must remove the waypoint from all routes before the waypoint can be deleted RTE FULL An attempt has been made to add more than nine waypoints to aroute The GPS 50 will not allow more than nine waypoints per route SRCH SKY The GPS 50 is in search the sky mode Allow the unit to complete its data collection before turning it off TIMER EXP The count down timer has expired APPENDIX B NAVIGATION TERMS B 1 DEFINITIONS This section provides an illustration of and definitions forthe navigati
56. rida ends at NSAU Nassau in the Bahamas and is 365 nautical miles long The Route Catalog Page displays one route at atime Additional routes may be displayed by pressing the MORE key while the cursor is under the route number Alternatively you may press number key 1 through 9 or 0 for active route to select your desired route The Route Catalog Page allows you to initiate various operations onthe route you have selected By pressing ENT the Route Catalog Page will change as illustrated below RIE MORE Action ACTIVATE H C T I v H I E P INVERT EDIT CLEAR RNI COPY re 2 You may press the MORE key to select route editing activation copy and deletion functions 6 3 EDITING ROUTES From Waypoint To Waypoint Desired me Track MYR KWOT S Distance egy i234 Leg Route Number L i r t e Number LO L8 tA rt1 rt9 ROUTE REVIEW PAGE The Route Review Page displays the waypoints of a route and allows you to create change and review routes It shows the route and leg numbers the two waypoints composing the leg and the distance and desired track between the two waypoints This page shows one leg at atime You may press the arrow keys to review additional legs As you scroll past the first or last waypoint it will return to the Route Catalog Page To create a route Select an empty route on the Route Catalog Page and press ENT The Route Review Page will be displayed as illustrated below
57. s displayed Press ENT The Route Review Page will be displayed With the cursor under the to waypoint press the arrow keys to scroll through the waypoints until the waypoint you wish to delete appears Press CLR followed by ENT to delete the waypoint Press RTE to return to the Catalog Page when editing is completed To clear a route Select the desired route on the Route Catalog Page and press ENT Press MORE until CLEAR is displayed Press ENT All waypoints are cleared from the route The waypoints of an existing route may be copied to an empty route using the Route Catalog Page This is useful if you wish to store the contents of 6 4 the active route route A before activating another route Also youmay copy a route and then make changes to form a new route To copy a route Select the desired route on the Route Catalog Page and press ENT Press MORE until COPY is displayed Press ENT The Route Catalog Page will appear as illustrated below MORE CPY TU 3 P 3 rk p Press MORE until the route number of the empty route to which you wish to copy is displayed then press ENT If no empty routes are available you will be informed with the message NO EMP RT 6 4 ACTIVATING ROUTES From RTE To Waypoint M Y R K W G T Waypoint DIK RNG Desired e uf g J Nu Distance Track i ETE Leg A k 3 3 Estimated Time Number Enroute AL L0 L8 ACTIVE ROUTE PAGE R
58. slands QATAR NATIONAL Qatar QORNOQ South Greenland REUNION Mascarene Island ROME 1940 Sardinia Island SANTO DOS Espirito Santo Island SAO BRAZ Sao Miguel Santa Maria Islands Azores SAPPER HILL 1943 East Falkland Island SCHWARZECK Namibia SOUTH AMERICAN 1969 Argentina Bolivia Brazil Chile Colombia Ecuador Guyana Paraguay Peru Venezuela Trinidad and Tobago SOUTH ASIA Singapore SOUTHEAST BASE Porto Santo and Madeira Islands SOUTHWEST BASE Faial Graciosa Pico Sao Jorge and Terceira Islands Azores TIMBALAI 1948 Brunei and East Malaysia Sarawak and Sabah TOKYO Japan Korea Okinawa TRISTAN ASTRO 1968 Tristan da Cunha VITI LEVU VITI LEVU 1916 Viti Levu Island Fiji Islands WAK ENWTK WAKE ENIWETOK 1960 Marshall Islands ZANDERIJ ZANDERUI Surinam WGS 72 WORLD GEODETIC SYSTEM 1972 WGS 84 WORLD GEODETIC SYSTEM 1984 A Active from waypoint Active route Active Route Page Active to waypoint Alarm Clock Page Alarm Page Alarms Alphanumeric field Altitude manual entry units Anchor drag alarm Arrival alarm Audio Setup Page AutoStore Page B Backlighting adjusting timeout Backlighting Page Banners Battery pack AA size Rechargeable Removing Battery Saver mode Bearing BRG C CDI Page CDI Scale Page Confirmation field Count down timer Course Made Good CMG APPENDIX E B 2 2 3 2 3 2 5 5 1 B 2 3 1 2 1 B 2 5 2 5 2 2 3 4 6 3 8 B
59. so manually scroll through the list of visible satellites To manually scroll through the visible satellite list Use an arrow key to move the cursor under the satellite identifier Press MORE to view each visible satellite s information Press ENT to remove the cursor and return to automatic mode 3 3 PRESENT POSITION NAV ALT Altitude SBD 4J Lattuae s w g f Mag Longitude POSITION PAGE The Position Page may be displayed by pressing the NAV key This page displays your latitude and longitude relative to the selected earth datum see Section 4 11 as well as the altitude above mean sea level MSL When the GPS 50is performing 2D navigation the last known altitude will be used in the latitude longitude computation If the altitude is not accurate within a few hundred feet you should manually enter your altitude To change the altitude Use an arrow key to move the cursor under the altitude Enter the altitude If your antenna is mounted on a high mast make sure you add the mast height Remember to complete the data entry by pressing ENT During initial satellite acquisition the displayed position is the last computed position stored in the GPS 50 If your position has moved more than 1000 nautical miles with the power off you may wishto enter amore accurate initial position to speed up the acquisition process You may also change the position at any time when you are operating in simulator mode
60. t name and enter the name of your choice With the cursor under WPT the storage selection field press ENT 3 5 CDI AND NAVIGATION SUMMARY Desired Course Your Position From Waypoint To Waypoint x NAV y redon aTa MYR BRYT ane BRG Pa ps Te a RNG CTS wT 3 74 CAT 3 qMU ovo TRK cs TRK GS Direction i p J i Be i i p J Speed sD CMG ETE TRK CDI on line 1 Active leg on line 1 GS TRN VMG CDI PAGE The CDI Page may be displayed by pressing the NAV key This page displays virtually all the information you need to guide your craft The CDI Course Deviation Indicator is oriented so that the center represents your desired course and the CDI hash represents your position You must steer toward the center of the CDI to eliminate cross track error and stay on course The to from arrow in the center of the CDI indicates if you are navigating to the waypoint up arrow or if you have passed the waypoint down arrow You may set the CDI alarm and CDI scale from the Setup Pages see Sections 4 3 and 4 7 You may select the type of information you wish to see oneach line To make achange place the cursor under the field and press the MORE key until the appropriate information is displayed See Appendix B for an illustration and further explanation of the selectable navigation information on lines two and three Online one you may elect to display a CDI or the active leg see Chapter 6
61. the tests the GPS 50 will begin acquiring satellites that will typically take two minutes to obtain a position fix Initially the GPS 50 will display the ACQ banner it will inform you when a position fix is obtained by transitioning to either the 2D or 3D banner When four or more satellites with good geometry are available the GPS 50 will automatically operate in the 3D mode in which latitude longitude and altitude are computed If only three satellites are available the unit will operate in 2D mode in which only latitude and longitude are computed When operating in the 2D mode the unit will use the last computed altitude or your last entered altitude Section 3 3 describes how you may enter the altitude If less than three satellites with acceptable geometry are available the DR banner will be displayed Your GPS 50 will automatically update satellite orbital data as it operates If you have not operated your unit for aperiod of six months or longer it willtake approximately 12 5 minutes to search the sky and collect new orbital data You will be informed when your unit is searching the sky with the message SRCH SKY Additionally the DATA banner will be displayed Once satellite orbital data is collected it willbe stored in battery backed up memory This means the data will not be lost when you turn your GPS 50 off 3 2 SATELLITE STATUS Satellites EPE Tracked Visible Satellite Identifier
62. to the positive side of the 5 40 volt DC power source The GPS 50 may be connected to other marine electronics such as an autopilot or plotter which use an NMEA 0180 NMEA 0182 or NMEA 0183 C 3 data interface The unit can provide data for up to three NMEA listeners simultaneously Refer to installation instructions of these devices for further information To connect the GPS 50 to an NMEA electronic device Connectthe BROWN harness lead to the NMEA A line of atwo wire shielded cable Connectthe BLACK harness lead to the NMEA B line of the shielded cable Connect the BLACK harness lead to the shield of the shielded cable The opposite end of the shield should not be grounded C 3 UNIVERSAL MOUNT INSTALLATION The GPS 50 is equipped with a universal mount for fixed installations The universal mount may be installed above the dash or attached to a surface as shown below Although your GPS 50 is designed to withstand the marine environment it is recommended that it be mounted in a location which provides protection from sun and spray Before permanent mounting you may wish to apply power to the unit and look at the display in the desired mounting location to ensure you have the desired viewing angle To install universal mount above dash The universal mount is completely assembled and ready for fixed installation above dash Mount the base to the boat dash using appropriate screws 8 fl
63. units nm kt ft Statute units mi mh ft or Metric units km kh mt 4 7 CDI SCALE CRI SCALE CDI Scale CDI SCALE PAGE The GPS 50 allows you to set the scale for the CDI displayed on the CDI Page see Section 3 5 The CDI scale refers to the distance that is represented by the CDI For example if your CDI scale is set to 1 0 nautical mile the ends of the CDI represent left and right 1 0 nautical mile of cross track error To set the CDI scale With the cursor under the CDI scale field enter the desired value 4 8 MAGNETIC VARIATION Heading Mode Select Magnetic Variation 3D MAGNETIC VARIATION PAGE The GPS 50 offers you three magnetic variation options You may select true automatic magnetic or user magnetic heading correction for all track course and heading information If you select true heading all information displayed on other pages will be referenced to the true North pole If you select automatic magnetic heading all information will be corrected with the magnetic variation computed by the GPS 50 If you select user magnetic heading all information will be corrected by the magnetic variation you enter To select true heading With the cursor under the heading mode select field press MORE until TRUE HDG is displayed To select automatic magnetic heading With the cursor under the heading mode select field press MORE until AUTO MAG is displayed The computed

Garmin GPS 50 GPS Receiver User Manual

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