OPERATION & INSTALLATION MANUAL AIS RX CARBON & AIS
Contents
1. OPERATION amp INSTALLATION MANUAL AIS RX CARBON amp AIS RX CARBON TRUE HEADING Version 1 2E True Heading 2011 The manual may not in any aspect be copied without the prior authorization from True Heading AB E REVISION a a Ae 3 Z INTRODUCTION ia 4 ar O ELOSS Al ont 5 A SONDA 6 A o NE J D2 Wanat y CONGIMIONS ia 7 I Wy Al ATI POC COMICS r E E E EE 7 IA M TET AS UES e E E O T eee eer y eee 7 y SIPRI dd ne sier O to ta 8 7 INFORMATION ABOUT A Sica idad 9 Jl enero A nr ee oe eee ee en eee ee 9 2 Bhonmtecinical description of Al siii 10 Tio Laon Wil ATS E aed aes 11 SS ADRS CARBON tt da 12 Sak General CES CHIP OOM dario 12 92 TIECMMICAL PEC AO a 12 Sele Bec MCa aeaa da 12 luz Data 610 1 010 eier ee en eee en ee eee ee 12 Sr ROCNE gets ch sne a E re Nee Rs RN 12 S 2d PNY GUC AN Arneri es centers TA E AR bladens E E 12 9 HOW TO INSTALL AIS RX CARBON 5ossosrsseseeeerereeeeeeeeeeerererererrrrrerrrrrrrrrrrrrrrrr rna 13 Dede co GUC COM aot A cso cea ekg A ae ene 13 D a TA DI ATL OM ass sorti sr brak sat A reeds acre veep gee 13 O20 CMG CK Gy OU TALC A a E A 14 922 Is A A 14 O25 Amena MSTA UM aitiio 14 924 Compass sale dista ES 15 A O a A O A SAG Ode N 15 220 POWT usaran PEC O O A ee eee 17 A A A E EEE E T 18 10 OPERATIONAL GUIDELINES FOR AIS RX CARBON sossossrsrsssssssssssssererrrrrrrrrrra 19 H FAO sn a 23 1 REVISION Responsible Approved P1 0E 2010 05 31 Anders Bergstr m Nils Will2. Denmark It is of utmost importance that you read this manual before you start to install and use your AIS RX CARBON 3 GLOSSARY To make the reading of the manual easier we like to start up with introducing the used abbreviations and glossary AIS ATC DGPS ETA GPS GALILEO GNSS IMO NM RX SMA SOLAS SOTDMA STDMA VHF VTS Automatic Identification System Air Traffic Control Differential Global Positioning System Estimated Time of Arrival Global Positioning System European equivalent to GPS Global Navigation Satellite System International Maritime Organization Nautical Mile 1852 m Receive Receiver Swedish Maritime Administration Safety Of Life At Sea Self Organized Time Division Multiple Access Very High Frequency Vessel Traffic Services Like ATC but for ships 4 CONDITIONS Before you start using the AIS RX CARBON product from True Heading AB it is important that you read and fully understand the installation manual and its instructions You should only proceed with the installation if you are confident that you will be able to do so True Heading AB cannot be held liable for any injury or damage caused by during or because of the installation of AIS RX CARBON or SeaClear The AIS RX CARBON is used at your own risk and it shall be remembered that AIS and GPS data depends on the full co operation of other users and systems AIS RX CARBON is a navigation aid and works in co operation with other s
3. FEO 7 o O sRoOWO0059H 0x4 2 OU2RSPAIO gt fp Ub 2025 hwCI p 0x 4 025 hwC1 p 0x46 402R3GAuEHSFPICSLhOot M0000 0 15 DUZRSGAIq gt ip 017 12u gt 5139P001E3PnQtdbHA lt O0 bO0LOE 0 70 34 6FObO001P1CEaSUtwp9i7pdO1l2h x44 I SESn200000Ege0maQ5 bH 0099H 076 OO A 5922 2605 H 01803 2493 E 0 51 00 4 5922 2609 N 0150 gt 2496 E 0 24 13500423P0014ktbO0vvb 2gvf059H 072 00 4 5922 2609 N 0150 gt 2490 E 0 42 24 E ODO CCE Ot pkWr30164 x24 00 4 5922 2609 H 015605 2501 E 0 33 l3ur lt woPOOLBh4AVOtawbtwvhld ew 0 1 170505 170505 170505 170505 170505 170505 170505 170505 170505 ANENE 170505 10 OPERATIONAL GUIDELINES FOR AIS RX CARBON AIS RX CARBON has one 1 LED indicator to help with status monitoring of the AIS receiver The STATUS LED shows with green fixed light that AIS RX CARBON is connected to power 12 VDC or powered by USB and flashes when AIS data is received AIS RX CARBON will give several possibilities to enhance the navigational safety as a complement to e g radars and electronic charting systems With an AIS receiver you will improve safety during navigation in e g low visibility or at night At sea AIS provides a support to the radar especially during rain snow and sea clutter conditions With AIS it is also possible to se behind islands and bends something that will give an idea what s behind the corner Picture 9 Wit
4. in navigation and protect the marine environment AIS information transmitted from a ship contains of three 3 different main types Static data that was programmed into the AIS equipment at installation and it only needs to be changed if the ship changes its name flag or undergoes a major refit where size or ship type is changed Dynamic data contains information that automatically is updated from ship sensors like the heading from the Gyro Position and speed from GNSS equipment Also navigational status belongs to the group of dynamic data but is updated manually by the crew and Voyage related data that manually is updated by the crew along the voyage From the start AIS some times also was refereed to as UAIS or as the 4S transponder system that meant Ship to Ship and Ship to Shore IMO adopted 1998 a performance standard for AIS within the SOLAS requirement that described in general how AIS should work Below follows a brief description of the main requirements for AIS from the performance standard e Automatically provide information to AIS land stations other ships and airborne units e g SAR helicopters about the ships identity Type of ship Position Course Speed Navigational status e g under way using engine at anchor and other safety related information of importance e Be able to receive the same type of information from other ships e Be able to monitor and track other ships e Exchange information with land b
5. power connection Start your navigation system or plotter and set the baud rate to 38400 bit s on the serial port where you connect your AIS RX CARBON Note If you do not have any AIS software you can use the Hyperlink program supplied with Windows This can be found by pressing the Start button gt programs gt Accessories gt Communications gt HyperTerminal Set the com port for Baud rate 38400 Data bit 8 Parity None Stop bits l When you your port is set to receive data as described above you shall be able to see NMEA data for AIS called VDM according to the example below that follows normal NMEA structure EZ NMEA Input Monitor AIVDM SGPEHC SLPEHC IAIYDH SGPRHC IAIVDH 092215 092213 092 220 eas APENE ee 092221 IAIVDH IAIVDH IAIYDH lATYDM IAIVDH IAIVDH I AIYVDH IAIYDH SCPEMC SGPEHC lAITVDM SGPRHC IAIYDH SGPEHC I AIVDH ReRpppppppe pol Hite a 092215 092216 dido Be 092217 1 IA de 1 E e i O E oe e 346FUBD0O1R1CE5POu0A9aWiN0121 0 53 00 4 5922 2608 N 01903 2462 E 0 18 00 4 5922 2608 N 01803 2467 E 0 10 lou gt 2 P011EgnY tc 7 vOvNORIf 0 45 00 4 5922 2608 H 01803 2472 E 0 17 120 gt 5691h11E3YD00t0d An W4fP059H 075 00 A 5922 2608 H 01803 2477 E 0 46 00 4 5922 2608 H 01803 2402 E 0 32 O0 A 5922 2608 H 015803 2406 E 0 11 13u gt FYFO11BhontWteKVk v DB 1x7 2 00 4 5922 608 N 0190 490 E 0 33 102 RS FAME RS
6. Weight Connectors Data output port 9 15 Volt DC Power over USB 5V lt 1W 38400 b s default NMEA 0183 ver 3 VDM RMC AIS1 161 975 MHz AIS2 162 025 MHz 112dBm 50 ohm 120 x 80 x 29 mm 138 g VHF Antenna FME VHF Radio FME Plus version only NMEA 183 RS422 TX A and TX B USB Mini 120 111 71 STATUSe Ci Bx TADO a Picture 3Size of the AIS RX CARBON 9 HOW TO INSTALL AIS RX CARBON 9 1 Introduction AIS RX CARBON will be quick and simple to install You will need a antenna cable and connectors for the VHF radio included 2 m on the RX CARBON version and power access of 12 V DC When this is in place your AIS RX CARBON can easily be connected to your PC or any other type of display system e g a plotter Please be aware that the software that you use to display AIS data must be compatible with the standard messages that AIS provides on its output data port The data output port sends serial data through a serial cable to the display system so that AIS targets can be displayed 9 2 Installation This part describes the most important information you need to install your AIS RX CARBON receiver You should read the entire manual to get a full understanding of how to install and operate your AIS RX CARBON Please visit our webpage www trueheading se for updates on manuals etc If you want your AIS RX CARBON to operate with e g monitor software your plotter or a PC based software pleas
7. art 2010 06 02 Anders Bergstrom Nils Willart connector cable Nils Willart Additional info on USB driver 2 INTRODUCTION We like to thank you for choosing True Heading AB to deliver your AIS RX CARBON AIS receiver AIS RX CARBON is a high quality AIS receiver using VHF technology AIS RX CARBON makes it possible to receive information from ships buoys lighthouses SAR helicopters Coastguard units Pilot boats Weather station etc that are equipped with Automatic Identification System AIS transponders It 1s today a requirement for all ships above 300 GT to carry AIS according to IMO SOLAS regulation This means that a large quantity of ships and other type of navigational hazards or information providers will be seen by your receiver and contribute to enhanced safety in your navigation E Bizet ii Berro The ESD ita y CE ee eee Pd FEMI wpe Se einai L FRINP TKER F 5 P HE A l Fiume i SE a eje 2 f F Dimis antlers mn i epuap T e _ af cad Ze e IH DAN AB DO a Fis id r or E facial RADO DE SR ABNETT SKO O Cee Taaa f as aie Hea F ari A cree di RR hana AUF oa Sp i oe i E Ps F hae ee cat iti i o tl a TEE gD ps i d A VALU Cues OLYMP a asint fa E a Un habas aver EFT a Mm ad 4 1 3 a r aro ODE ajo Pa tae a ME ELLE Li Ej The lism Vector ighi da Toan m Picture 1 Real traffic scenario between Sweden and Bornholm
8. ased AIS systems AIS is an automatic system that continuously and simultaneously transmits on two channels in the maritime VHF frequency band AIS can handle several reports in a rapid consecutive flow To accomplish these AIS uses a technique called Self Organized Time Division Multiple Access SOTDMA that guarantees high transmission safety and operational robustness AIS also allows for other types of information from e g sensors like Gyro GPS and echo sounders etc to be transmitted automatically Important areas where AIS is used are e Information exchange between ships within VHF range normally 20 30 NM to enhance safety at sea and to improve situation awareness e Information exchange between ships and AIS land stations as e g a VTS that controls and monitors maritime traffic in an area e Automatic reporting in areas with mandatory reporting of different kinds e Exchange of safety related information between ships and between ships and land stations e Services like e g meteorological information in real time from areas of importance identity and position of floating and fixed aids to navigation to improve identification and navigation 7 2 Short technical description of AIS AIS operates primarily on two dedicated VHF frequencies AISI 161 975 MHz and AIS2 162 025 MHz In areas where these two channels are not available AIS can automatically change to other alternatively available frequencies AIS use
9. bove mentioned information can then be missing AIS RX CARBON can without charge be provided with the electronic chart system SeaClear SeaClear is presented separately with its own user manual Below some examples of how AIS can be presented in various types of electronic chart systems or plotters At present several manufacturers can provide systems that can display AIS A list of the once known to us can be found in the chapter FAQ aa E Picture 13 Example how AIS is presented in SeaClear Picture 14 Example how AIS is presented in AIS Yacht 11 FAQ Q Is it possible to use an existing VHF antenna A Yes you can use an existing VHF antenna with the AIS RX CARBON version otherwise a by adding the True Heading VHF antenna splitter to the installation Then the same antenna used for VHF DSC can be used also for the AIS RX CARBON Q What type of VHF antenna do I need for my AIS RX CARBON A The VHF antenna should at least fulfill the following requirements Antenna type Vertical radiator Antenna gain 0 3 dBd Impedance 50 ohm Q Is it possible to connect my AIS RX CARBON to a plotter A Today most plotters are prepared to connect AIS and to display AIS targets For further information contact your supplier and ask about AIS interface to their product Q What electronic chart programs can handle AIS today AIS A Today several software are prepared for AIS those known to us are Adveto AECDIS series Fu
10. ct to True Heading AB through mail fax or e mail to our support department 5 4 Other issues Proper seamanship and common sense 1s applicable when using AIS RX CARBON and the products shall only be seen as a navaid True Heading AB keeps the right to change the specification of the product without prior notice IF YOU ARE NOT ABLE TO ACCEPT THE TERMS ABOVE PLEASE RETURN THE AIS RX CARBON TO YOUR RETAILER FOR FULL CREDIT BEFORE OPENED AND USED 5 SUPPORT If you need support please contact the closest reseller or the location where you acquired the product The manufacturer can also give support direct Email support trueheading se or Fax 46 8 54593910 Please register your purchase of AIS RX CARBON with True Heading AB by sending an e mail to register trueheading se stating the serial number date of purchase your name address and your dealer s name 7 INFORMATION ABOUT AIS 7 1 General AIS Automatic Identification System is the name of a system that makes it possible for ships to identify other ships and to monitor ship movements The reason for implementing the AIS system is for the mariner to obtain more information about ships in the vicinity than what radar is able to provide AIS gives e g information about a ships identity name call sign IMO number and MMSI size this even for ships behind Island or bends that radar cannot detect AIS is used to enhance safety for life at sea improve safety and efficiency
11. d or calibrated ship sensors positions speed or heading sensors could lead to that wrong information will be transmitted Dangerous situations can occur if faulty information is shown on another ship 8 AISRX CARBON 8 1 General description With your AIS RX CARBON you will be able to see other ships that has been equipped with AIS and comes within your VHF coverage area Information transmitted is e g name on the ship call sign Heading Speed Course Destination and Type of ship AIS RX CARBON complies to the NMEA0183 and IEC 61162 1 standards and can be connected to all kind of ECS or radar system that supports these formats and has the capacity to display AIS targets and data The installation is quick and easy since it only requires power connection a VHF antenna and then a data cable to your display system and proper setup of the same AIS RX CARBON is a very good complement to radar since ships carrying AIS will be easy to identify on the radar screen 8 2 Technical specification AIS RX CARBON is a compact two channel receiver with a synthesized VHF receiver that operates in the maritime VHF frequency band It has been designed to receive and decode transmissions from other AIS transceivers 8 2 1 Electrical data Power 1 Power 2 Powerconsumption 8 2 2 Data output Data Speed Format Out data NMEA messages 8 2 3 Receiver Frequency Sensitivity Antenna impedans 8 2 4 Physical data LxWxH
12. e act as follows 9 2 1 Checking your material Check that you have received all the equipment with your AIS RX CARBON and that the delivered equipment has not been damaged during delivery If the equipment has been damaged please contact your reseller or our support 9 2 2 Installing your receiver AIS RX CARBON is made to be installed in a protected environment in door and shall therefore be placed where it is well protected from humidity and water AIS RX CARBON shall not either be placed close to generators or compressors from e g refrigerators since they can interfere with the reception Normally a suitable placement of the AIS RX CARBON is together with other types of navigation equipment and the PC or plotter that will be used to display the AIS data also a position close to a location where power is easy available is a good idea AIS RX CARBON contains one LED indicator for power therefore it is a good idea to have the indicators viewable to ensure performance and functionality AIS RX CARBON is easy to mount on the bulkhead or panels with two normal screws not included 120 gt 111 E SE d ia amp E i jmi RI J BTATUe Co RX TX DO Wy 4 Picture 4 Measurements for the installation of the AIS RX CARBON 9 2 3 Antenna installation Install the VHF antenna at a suitable position onboard see further below The an
13. el 87B AIS 1 161 975 MHz and channel 88B AIS 2 162 025 MHz AIS frequencies are situated in the duplex band close to coastal stations transmit channels To avoid interference the AIS RX CARBON antenna shall be separated as much as possible from the ordinary VHF antenna The best separation will be accomplished if the antennas are placed on different heights or placed on different sides off the mast or boat True Headings VHF splitter can also be used as an effective solution to the antenna placing Line of sight To have the best possible reception for the AIS RX CARBON the antenna shall be placed with free line of sight around the full horizon Larger objects can stop the signals from certain directions Antenna height AIS use frequencies in the maritime VHF band The area of coverage in this frequency band is almost the same as line of sight This means that the higher you put your antenna the longer range you will obtain The VHF antenna shall be of a standard marine type for full functionality off the AIS RX CARBON Antenna type Vertical radiator Antenna gain 0 3 dBd Impedance 50 ohm The VHF antenna to the AIS RX CARBON shall be placed as high as possible and with proper separation to other transmitting antenna equipment onboard A suitable solution 1s to use the VHF antenna splitter from True Heading that allows you to use existing VHF antenna installations if existing The VHF splitter solution will save both time and insta
14. gawi Fugro ICAN Aldebaran Nobeltech SeaClear Transas Navisailor All software that can handle the NMEA message VDM and display the data will be able to present AIS Ask your provider for further information In addition stand alone display software 1s available like e g the AIS YACHT from Y tronic Q Will AIS RX CARBON work with my network solution onboard A All networks that can handle NMEA VDM data at the speed 38400 b s will be able to handle AIS data Most exisiting data networks will not Ask your network provider for further information Q I do not have a serial port on my computer how can I then get the data from my AIS RX CARBON into the PC A The AIS RX CARBON has both a serial port and a USB port for easy connection both to a plotter and a PC at the same time 12 NOTES
15. h AIS you can see behind island and bend Several Maritime authorities will also transmit safety related information using land based AIS networks These are messages that will contain information about e g sudden threats in fairways navigational warnings meteorological data etc Meteorological information will also be transmitted in real time from certain strategic positions along coastlines That data will contain information like Wind Speed Wind Direction Water Level Temperature Currents and Tide etc ADYETO AECDIS2000 1200 1 42 Licens 20087 Adveto DEMO Rutt Namnl s Datab Rutt Databas Inspelning Spar ECDIS Visa WGS84 Konfigurera Tidvatten Om o 00 00 00 Fs fo 20 om Y 2 min 637476370 01901 2323 Klan FA Dag REVENGEGRUNDET SANDHAMN_CH 883 f 11 7 m s Picture 10 Meteorological data transmitted with AIS in real time AIS transponders will transmit the following data that can be received from your AIS RX CARBON Static Information Dynamic Information Voyage related Information O OName OO Position O Destination JU Type of ship JSpeed Over Ground Depth J Call sign O JCourse Over Ground OOETA OOMMSI number OORate Of Turn Navigational Status _ IMO number O Heading LI USize Note Sometimes ships have not properly programmed their AIS transponders and parts of a
16. ill be discriminated in favor of targets close to your own ship In reality the system capacity is unlimited and allows for a large number of ships to communicate simultaneously The principle of AIS STDMA ITDMA Each time slot prenda 26 6 milliseconds The ANS ol sk A lepra Fie pisia messire in ans time 5104 41 Che same time It noeserves another Hime shot dor ihe pet p sition Mess dde peer fepested by all uber AIS equipped shins Picture 2 The principle of AIS technology on the two radio channels 7 3 Limitations with AIS You should always be aware that all ship others ships and in particular pleasurecrafts fishing boats warships and some coastal stations and VTS centers not will be equipped with AIS Ships that have been mandated to carry AIS can also under certain conditions turn off their AIS equipment at the master s discretion Therefore it is important to be aware that the information that AIS provides might not be the full and complete picture of the situation around your ship Users of AIS must also be aware that transmission of false data can occur and that this will be hazardous not only to your own ship but to other as well The user is responsible for all data that is entered into the system and for information provided by external sensors The accuracy of received AIS data is only as good as the information transmitted from the source of information You should always be aware that wrong configure
17. imilar systems like e g radar optical lookout etc The AIS RX CARBON installation should be inspected from time to time and checked on its operational quality frequently by the user Remember that navigation and life at sea always requires proper seamanship and that the AIS RX CARBON is not a replacement for such qualities SeaClear is only a navigational aid It collects calculates and displays data for you but there is no guarantee it is correct there are many sources for errors SeaClear is not a replacement for navigational knowledge nor can it navigate by it self Use it with care Always have the original charts available when SeaClear is in use True Heading does not take any responsibility for functionality of SeaClear neither are we responsible for any charts used in conjunction with SeaClear NOT ALL VESSELS CARRY AIS IT IS THEREFORE IMPORTANT TO KEEP PROPER LOOKOUT AT ALL TIMES AND TO USE ALL AVAILABLE MEANS TO AVOID COLLISIONS AND ACCIDENTS WARRANTY 5 1 General AIS RX CARBON is developed and manufactured to meet high technical requirements and user demands If installed correctly and with regular maintenance your AIS RX CARBON should provide you with several years of operation and a very useful product For further information provided in the manual and in this information sheet please consult the place where you purchased the AIS RX CARBON or direct to our support 5 2 Warranty conditions The warranty belongs to the
18. llation cost further an existing VHF antenna is normally placed already on the most favorable location onboard The VHF antenna connection shall be connected to the right connector BNC on the AIS RX CARBON as shown below VHF antenna connection FME Picture 6 VHF antenna connection 9 2 6 Power Connect the AIS RX CARBON to 12 V DC via a 0 5A fuse The AIS RX CARBON requires a power cable already with a fuse that connects to the included socket connector that comes with the receiver according to picture 8 Red cable is positive Black cable 1s negative When AIS RX CARBON is connected to 12 VDC the PWR POWER LED indicator shall be green When receiving data the LED will flash Connection for data through USB o mini and or NMEA 0183 data Data ut port Power can be provided from both USB and 12V DC direkt Picture 8 Data antenna and power connection 9 2 7 Connection to PC Use the included USB cable for NMEA 0183 format Connect the cable to the connector on the AIS RX CARBON and then to the PC The driver for the USB port should in most Windows OS install automatically but if not the driver for the USB on the AIS RX CARBON can be found on the CD included with the delivery of the product or at our webpage at http www trueheading se en ais rx carbon For plotters use the NMEA 0183 data port with a 2 pole cable connected to the green connector next to the USB port Please note that this port also includes 12 V DC
19. person that purchased the product and cannot be handed over to a third party or person The warranty 1s not valid 1f serial number 1s missing seals broken or 1f the AIS RX CARBON has been incorrect installed Neither is the warranty valid if instructions for connection have not been followed faults caused by wrong usage own made modifications or service made from none authorized service stations True Heading AB acknowledges that AIS RX CARBON at delivery has been controlled and found operational True Heading AB agrees to repair or replace any faulty unit without any cost according to the conditions set forth during a period of two 2 years from day of purchase The warranty includes replacement or repair of faulty unit due to error in components or errors in relation to the production of the product The warranty covers costs for spares labor and return shipment It does not include shipment from to the repair facility True Heading AB will never be liable under the warranty conditions for incorrect use misuse and incidental indirect or consequential damages of the AIS RX CARBON Proof of purchase is required for any warranty claim of the AIS RX CARBON 5 3 Warranty procedures True Heading AB repairs and replaces faulty parts or units The customer is responsible for transport of the defect part or unit to True Heading or its retailer Warranty claims shall be made to the place where AIS RX CARBON was purchased or dire
20. s two VHF radio channels where the information is transmitted in short data packages or slots in predefined and synchronized time frames The dynamic information position speed heading etc is transmitted in intervals from 2 s up to 10 s depending on the speed and maneuvers of the transmitting ship were the AIS is mounted Static and voyage related information type of ship size cargo destination etc is transmitted every sixth minute or upon request from other units Position course and speed normally are collected from the same sensor systems that provides the same information used in the navigation e g in radars or ECDIS and this is normally based on GPS or DGPS All ships within VHF coverage will be able to receive AIS data and competent authorities that have installed networks with coastal AIS coverage can receive the information The capacity for the ships to report is defined by the IMO performance standard to a minimum of 2000 data packages or slots per minute see picture 2 ITU Technical Standard for the Universal AIS has been kind to double this and has provided AIS with 4500 data packages or slots per minute The transmission is based on the SO TDMA Se f organized Time Division Multiple Access technique that allows the system to overload with 400 till 500 and still give almost a 100 message throughput between ships that are closer to each other than 8 to 20 nautical miles In such case the system overloads targets far away w
21. tenna cabling should be installed the shortest possible way and cable type selected depending on cable length to avoid losses All connectors should be properly connected to avoid losses and thoroughly sealed with self amalgamating rubber tape to avoid humidity in the connectors and thereby reduced functionality Quick quide for cable selection Length Cable types lt 10 m cables RG58C U gt 10 m cables RG213 U 9 2 4 Compass safe distance The table below shows suitable safety distances to other equipment that could cause interference with the AIS receiver Safety distance Radar antenna X band I 5 m 5 ft 9 2 5 VHF antenna AIS RX CARBON is not delivered with a VHF antenna as standard since requirements for the antenna and the cables can be different in various types of installations The VHF antenna is necessary for the AIS receiver to work properly VHF antennas can normally be provided by marine electronic shops True Heading can also provide a suitable package including a high quality low cost VHF antenna adapted for AIS RX CARBON Please ask for our VHF antenna or our package solutions The antenna cable type should be at least RGS8C U or better The VHF antenna installation is often a compromise of the following requirements e Separation between different antennas e Free line of sight 360 degrees e Antenna height Antenna separation The AIS receiver uses frequencies in the upper part of the maritime band Normally chann
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