Nautilus DIVE PLANNER Version 1.0 User's Manual
Contents
1. the increased gradient bubble model This process of updating the ascent repeats until the decompression time converges to what supposedly corresponds to the formation of the maximal allowable amount of free gas The first and last schedules produced for a short dive are often quite different This results from the contribution of both the magnitude of the growth gradient G and the time that the gradient acts to drive bubble growth Aftera short dive the tissues will off gas rapidly to circulation Hence because the time that the gradient acts is small the magnitude of G can be increased by allowing shorter and shallower stops VPM tables handle the in and out gassing of dissolved gas in tissues the same way as conventional neo Haldane calculations do That is parallel compartments with exponential half times ranging from minutes to hours are used to model the uptake and elimination of inert gas by the body This is and off gassing is handled symmetrically in all of my programs The divergence of the VPM from conventional calculations is in the details of how a diver s ascent is controlled Rather than setting limits on the maximum pressure ratio difference between gas dissolved in tissues and ambient pressure supersaturation ascents are limited by controlling the volume of gas that evolves in the body due to the inevitable formation of bubbles As long as this volume is kept smaller than a certain critical volume it is pr2. Si DIVE PLANNER Generate Profile Preferences Gas Setup Table Output Compare Manage Profiles Formulary Gas Mixing Help Bottom Mix Air Available Breathing Decompression Travel Mixes M Air C Trimix 16 70 V Oxygen C CustomMix3 LIEAN 28 C CustomMix4 CEAN 32 C CustomMix5 CEAN 36 C CustomMix6 CEAN 40 C CustomMix EAN 50 C CustomMix8 sl C CustomMix9 Trimix 21 25 C customMix10 C Trimix 18 35 E CustomMix11 C Trimix 18 50 E CustomMix1 2 C Trimix 30 30 F customMie12 E Trimix 16 60 E Heto 16 C CustomMix13 eliox C Trimix 15 60 D i Define Custom Mixes v Oxygen 21 Nitrogen 79 Helium 0 Max Operating Depth Equivalent Air Depth Equivalent Narcosis Depth Min Operating Depth Mix This Gas NAUTILUS Gas Setup screen is where the user creates the Gas Portfolio that will be available for creating profiles and tables Here the user will select the gases that are expected to be used for a particular dive or that the user would like to have available while planning dives There are 15 pre defined gas mixtures that are commonly used for divers There are also 14 additional Custom Mix placeholders available for creating additional mixes for the gas portfolio Creating a Custom Mix is as simple as using the sliders to specify the composition of the gas mixture desired NAUTILUS will display MOD based on 1 6 atm PO2 Min Operating Depth assuming a PO
3. UPDATED VERSIONS ARE AVAILABLE ON OUR WEBSITE AT http www nautilusdiveplanner com 29 Tech Diving Limited Tech Diving Limited a division of Scuba Training and Technology Inc 2959 Kiowa Blvd North Lake Havasu City AZ 86404 928 855 9400 928 855 9529 fax info techdivinglimited com Printed 3 16 05
4. s dating back to the early 1900 s The 10 Compartment model is used in many US made dive computers and the 12 Compartment model was used in the Orca Edge Dive computer In 1989 Nafe was able to extend Huggins 12 Compartment model to track using the same computational method that Buhlmann had been using for the previous 25 years Nautilus allows the tracking of helium in the diver s breathing mixture using this computational method which is similar to using equivalent air depth for employing an air table while breathing nitrox No diving profile or decompression model including those generated from within NAUTILUS can assure me that will not be injured or killed 23 Nautilus CAN yy DIVE PLANNER 3 3 Hamilton Kenyon Model 11 Compartment Parallel TIIa 11F6 aka DCAP NAUTILUS Dive Planner is the only commercialy available decompression software product to liscense the Hamilton Kenyon decompression model for use in generating decompression schedules for the technical diver The model has been incorporated into some proprietary rebreather decompession computers most notably the Cis Lunar and others to be available shortly Some of Dr Hamilton s algorithms for oxygen handling have been used in many of the popular dive computers Until now the only way to get tables using the Hamilton Kenyon Model was to have access to the famed Key West Consortium Tables which were the basis for most of t
5. are formed in SUB DIVEDATA on the first iteration and then in SUB PNEW on subsequent iterations The critical gradients limit ascents because they are directly related to the rate of bubble growth by the diffusion equation Reference Eric Maiken http www decompression org maiken VPM_Background htm The appendix of D E Yount D C Hoffman On the Use of a Bubble Formation Model to Calculate Diving Tables Aviation Space and Environmental Medicine February 1986 NAUTILUS incoporates the Variable Permiability Model into its portfolio of Decompression Models The user will have control over the values used for Gamma Lambda and M yielding what NAUTILUS designates as VPM x VERSION 1 0 3 6 Future Models and Integration The goal of NAUTILUS Dive Planner is to be the single source tool for decompression planning for the advanced and technical diver We will continue to seek out and work with the best minds in decompresison modeling and bring to NAUTILUS more reliable models as time progresses We hope with time to incorporate some of the Navy Probability models including V VAL and others We also expect to incorporate the ability to import data from the more popular dive computers and dive data recorders This will enable users to pull dive profiles into NAUTILUS and use that data as the basis for creating repetitive dive schedules But that is in the future ENEMIC yy IVE PLANNER THIS MANUAL IS NOT COMPLETE
6. it at 1 41 Shallowest Deco Stop Set the shallowest stop desired using the slider Nautilus will calculate the decompression to that depth Avoid Stops at This is a great option to help avoid stops in areas where it may not be feasible to do a stop due to sea conditions or topographical conditions Chose from 4 preset depths or enter a specific depth Deco Stop Intervals Set the interval between stops 3 5 10 15 fsw Smaller intervals make a smoother decompression shape 12 VERSION 1 0 SAVE This button will save the preferences set until they are reset by the user Upon opening NAUTILUS these preferences are enabled and table generation can begin RESET Press this button to reset all the preferences to the standard defaults 2 2 1 NAUTILUS STANDARD DEFAULTS are Imperial FSW Stop Time Open Circuit SAC 75 cu ft Classic Air Breaks 16 Compartment Buhlman 15 Conservatism No Deep Stop Sea Level 1 61 atm PO2 for Decompression Gas Shallowest stop at 10 fsw NAUTILUS assumes instantaneous descent Meaning that bottom time is calculated at the maximum depth immediatley from the time the diver leaves the surface Users are to follow the ascent rate indicators of their bottom timing devices or dive computers The ascent rate to the first stop should be at a rate of 60 fsw min 20 msw Min Thereafter 30 fsw min 10msw min VERSION 1 0 2 3 Gas Setup Nautilus Dive Planner File Edit Nautilus
7. sub clinical bubbling occurs on every dive of significant depth and or time The VPM A VPM B VPM E and RGBM models were derived from this work initially done by Yount and are very popular with technical divers today The following is an excerpt from Eric Maiken who has done a significant amount of work with VPM The Varying Permeability Model VPM was developed to model laboratory observations of bubble formation and growth in both inanimate never been alive and in vivo soon dead systems exposed to pressure In 1986 this model was applied by researchers at the University of Hawaii to calculate Diving Decompression Tables Reference 1 Although the original VPM is considered dated by specialists in hyperbaric medicine the time lag between the formulation and public release of the latest decompression methods has left many divers following ascent schedules that are justified by obsolete Victorian era physical models Further compounding the problem is the widespread use of commercial decompression software with excessive arbitrary parameters hiding behind siren song front ends that allow programmers to dish out crucial physiological advice Finally the mathematical and physical bases of the bubble models have kept them inaccessible to all without degrees in physics or math and so apart from reports filtering back from the front lines few have understood seen or used this stuff So caveat emptor and beware too The VPM presumes
8. the most popular versions will be Nautilus 140 225 and 330 The Nautilus RE research version is limited in availability to laboratories universities military and commercial diving companies only Each version of Nautilus allows for complete decompression planning with either open circuit closed circuit or a combination of those diving modes Users can select from air oxygen nitrox trimix heliox nitrox setpoint or heliox setpoint gas modes Users can plan square multilevel or repetitive dive profiles with complete control and interchangeability of diving modes Nautilus Dive Planner is the only decompression planning software that incorporates the full functions ofa true decompression planning tool with a choice of decompression algorithms and models Nautilus PN j DIVE PLANNER 1 3 NAUTILUS FUNCTION TABS Nautilus Dive Planner Software uses tabs inside the program to allow for navigation to the individual function pages They are arranged left to right in the order that the user will access them after the initial setup Ultimately once the users standard preferences are set the tabs will not need to be accessed until the next time preferences need to be modified This section will describe each TAB set The next section will take you though each of them with screen shots 1 31 GENERATE PROFILE Here is where the actual dive profile is entered and viewed in a simple graphical display Square profile mul
9. using NAUTILUS the Preferences With the Preferences and Gas Setup already in place and Gas Set up need to have been visited before enter the DEPTH of the Dive and the TIME for the dive generating a profile If however the PreferencesandGas Check the pull down menu and ensure the bottom mix Setup have been completed the user can start off at the desired is selected Generate Profile tab Press the DIVE button This will now enter the first leg of the dive The decompression ceiling will be displayed to the right of the dive button This ceiling is essentially the first stop 14 VERSION 1 0 To perform the decompression calculations using All Available Gases that have been selected in the GAS SET UP confirm that there is a 0 in the Decompress to a Depth area and press DECO NAUTILUS will calculate decompression and perform gas shifts are the appropriate levels based on the maximum PO2 selected in the PREFERENCES tab A general Depth Time schedule will appear to the right of the dive graph From here the user can either SAVE the dive profile by pressing the SAVE button or press RESET and start all over again 2 4 2 CREATE A MULTILEVEL PROFILE DIVE Creating a Multi Level Profile with NAUTILUS takes just a little more work but is still quite simple Nautilus Dive Planner File Edit Nautilus SI DIVE PLANNER 1 Decide the levels desired 2 Enter the First Level in the Depth Time boxes an
10. 2 of 16 atm Equivalent Air Depth for nitrox mixes Equivalent Narcotic Depth assuming oxygen is included in the narcotic properties Click Mix this Gas and it will save it to the gas portfolio SAVE This button will save the gas portfolio selected and they will now be available for generating profiles RESET Press this button to reset the gases in the portfolio to Air and Oxygen only 13 VERSION 1 0 A ETT iD DIVE PLANNER 2 4 Generate Profile Nautilus Dive Planner File Edit Generate Profile Preferences Gas Setup Table Output Compare Manage Profiles Formulary Gas Mixing Help Depth Time Gas O msl stoptime 16 Compatt 200 fsw 30min Trimix 18 35 100 fsw 2min Trimix 18 35 90 fsw 2min Trimis 18 35 80 fsw 3min Trimix 18 35 70 fsw i EAN 50 60 fsw i EAN 50 50 fsw i EAN 50 40 fsw i EAN 50 30 fsw i EAN 50 20 fsw i Oxygen 10 fsw i Oxygen Ofsw i Alr Square Profile Illustrated in stop time 200faw30 min Dive Depth 200 fy Time 30 minutes Gas Trimix 18 35 vi Ceiling 0 fsw Decompress to a depth of 0 breathing All Available Gases i CNS 02 1 Hr 30 Min surface interval breathing Air Surface Interval OTU s Generate Profile is the area where the user will plan the 2 4 1 CREATE SINGLE SQUARE PROFILE DIVE dive and generate the first set of decompression numbers o Generating a profile with NAUTILUS is quite simple Ifthis is the first time
11. CA yy 7 Nautilus DIVE PLANNER VERSION 1 0 User s Guide Tech Diving Limited 2959 Kiowa Blvd North Lake Havasu City AZ 86404 928 855 9400 voice support nautilusdiveplanner com ATTENTION READ THIS MANUAL Sia COMPLETELY PRIOR TO USE Version 1 0 Copyright 2004 2005 Tech Diving Limited All rights reserved VERSION 1 0 Nautilus DIVE PLANNER Important remarks concerning the manual This manual makes use of the following icons to indicate especially important comments aa Indicates information about details which are important to prevent a risky situation Indicates a potentially hazardous situation which if not avoided could result in death or injury Nautilus Dive Planner User s Guide Version 1 0 By Joel D Silverstein and R Dan Nafe ist Edition March September 2005 Copyright 2004 2005 Tech Diving Limited Scuba Training and Technology Inc Joel D Silverstein and R Dan Nafe No part of this publication may be reproduced without the express written permission of Scuba Training and Technology Inc NAUTILUS DIVE PLANNER is a product of Tech Diving Limited a wholly owned subsidiary of Scuba Training and Technology Inc The program is written and designed by R Dan Nafe and Joel D Silverstein NAUTILUS DIVE PLANNER runs under Microsoft Windows 3 1 3 11 95 98 NT ME XP Windows is a registered trademark of the Microsoft Corporation Mac OS 8 5 9 X is aregistered trademark of Appl
12. Stop Time O Metric Scuba Type Run Time Open Circuit Semi Closed Circuit Decompression Model Altitude Starting Altitude 0 msl Post Dive Altitude 0 msl J 16 Compartment Buhlmann SAC 0 75 cfm 21 Ipm 10 Compartment Neo Haldanian Closed Circuit Constant PO2 High Setpoint 1 3 bar J Deco Prefs Max PO2 on deco 1 61 bar atm J Shallowest Deco Stop 10 fsw Conservatism 0 Low Setpoint 0 7bar atm J Deep Stops Deco Bailout SAC 0 75cfm 21 lpm O No Deep Stops Air Breaks O No dit Breaks Classic Air Breaks Pyle Stops Avoid Stops at C 10 fsw 3m C 20 fsw 6m C 30 fsw Sm C 40 fsw 12m 0 fsw Deco Stop Intervals 10fsw Units Imperial or Metric in sea water Table Type Stop Time or Run Time Scuba Type Open or Closed Circuit and the associated SAC rates for those modes If Closed Circuit mode is used the Setpoint is to be indicated here Air Breaks Nautilus allows the user to have classic air breaks while breathing oxygen When the decompression time on with a PO2 of 1 3 exceeds 20 minutes a 5 minute break will be inserted with the next lowest nitrogen based mixture or trimixture ifnitrox is not available Nautilus takes into consideration the time off the oxygen when calculating the remaining decompression Decompression Model Choose from seven models Keep in mind that only one model may be used for a series of dives Switchin
13. age Profiles Formulary Gas Mixing Help 20faw20min 20min SOfaw17 min 110faw4min 120faw4min Square Profile CCR Heliox High Setpoint Classic Deep Stops Gas Shift to Offboard Oxygen Classic Air Breaks on CCR Illustrated in stop time 230faw30 min Dive Depth 230 f w Time 30 minutes Gas CCR Heliox High Setpoint Decompress to a depth of o breathing Oxygen 1 Hr 30 Min surface interval breathing Fe NAUTILUS will allow the use of multiple off board decompression gases and allow the user to create what if scenarios illustrating bail outs with off board gases as well The user needs to set up a gas portfolio under the GAS SETUP tab to have access to those gases Another feature of NAUTILUS is its ability to allow the user to conduct repetitive dives next section moving from CCR to OC seamlessley It is not uncommon for the dive professional to conduct one dive using CCR and then complete another dive with OC scuba NAUTILUS will help the user create these special schedules All the user needs to do is to create the gas portfolio for BOTH dives in the initial setup Depth Time O msl stoptime 230 fsw 30min 150 fsw 2min 140 fsw 2min 130 fsw 2min 120 fsw 4min 110 fsw 4min 100 fsw Smin 90 fsw min 80 fsw Emin 70 fsw 10min 60 fsw 10min 50 fsw 11min 40 fsw 16min 30 fsw 17min 20 fsw 20min 20 fsw Smin 20 fsw 20min 20 fsw Smin 20 fsw 1min Oxygen 0 fsw Omin Alr 16 Compatt CCR Helio
14. anner in which it delivers the myriad of information a diver needs to efficiently plan compare and analyze dives It makes no difference to NAUTILUS if the diver is using one gas three gases or ten gases It also makes no difference ifthe diver will dive on conventional open circuit scuba or closed circuit scuba or a combination of both NAUTILUS manages it all NAUTILUS is a control panel for the technical diver or instructor The NAUTILUS control panel allows the user to make rapid selections of important components of the dive plan in an easy to understand manner By utilizing tabs similar to that on a notebook the user can quickly navigate to the area they want to work in make the selections save that information and then plan the dive and create the table output NAUTILUS allows the user to select from not one but a variety of popular and proprietary decompression 6 VERSION 1 0 Fie Edit Generate Profile Preferences Gas Setup Table Output Compare Manage Profiles Formulary Gas Mixing Help Tobin 230fsn 30min Dive Depth 230 fey Time Decompress to a depth of 0 breathing All Available Gases 30 minutes Gas Trimix 18 50 v Surface Interval OTU s 1 Hr 30 Min surface interval breathing air algorithms NAUTILUS allows the user to make adjustments to the outputs of those algorithms through the use of gas selections avoiding stops at particu
15. b where it can be viewed or modified To delete a dive enter the Manage Profile tab select a particular dive and press DELETE The dive will be deleted from the NAUTILUS database Dive Name 250 Repet 200 20 Decompression Model 16 Compartment Buhlmann 16 Compartment Buhlmann 16 Compartment Buhlmann 16 Compartment Buhlmann Dive 5 16 Compartment Buhlmann 110 40 eanx 80 30 Scuba Type Bias Factor Deep Stops 19 Nautilus CA SA DIVE PLANNER 2 6 Compare NAUTILUS features a unique COMPARE function screen that allows the user to select two dive profiles and compare them in two graphical forms Overlay In this mode NAUTILUS will overlay two dive profiles This view is helpful in visualizing the effects of time and depth of two dives on the decompression of each This is helpful in identifying operational problems with a particular dive profile Nautilus Dive Planner File Edit VERSION 1 0 Two Window In this mode NAUTILUS will place the dive profiles in two seperate windows on the screen This mode allows a more general comparison of disimilar dive profiles It is helpful in analyzing multi level dives and in comparing dives using either Open Circuit of Closed Circuit equipment To access the dives use the pull down Menu and press DISPLAY for each dive desired NAUTILUS works best with two dives More windows will be available in future versions of NAUTILUS Generate Profile P
16. but must only be done with proper supervision and support Nautilus Dive Planner File Edit Cai Generate Profile Preferences Gas Setup Table Output Compare Manage Profiles Formulary Gas Mixing Help lofawOmit Depth Time Gas O msl stoptime 16 Compart 10fanw19min 10faw15min 150 fow 30min Air 50 fsw 3min EAN 50 40 fsw 2min EAN 50 30 fsw Smin EAN 50 20 fsw Imin EAN 50 10 fsw 19min EAN 50 Ofsw Omin Alr Ofsw 31min Air 100 fsw 40min EAN 36 10 fsw 15min EAN 36 Ofsw Omin Alr 100faw40 min 150fsw30min Dive Depth 100 fy Time 40 minutes Gas EAN 36 v Ceiling O fsw Decompress to a depth of o breathing EAN 36 v CNS 02 1 Hr 30 Min surface interval breathing Ajr v Surface Interval OTU s 18 VERSION 1 0 2 5 Manage Profiles NAUTILUS has a dive filing system that allows the user to SAVE each and every dive profile for future use Each profile saved includes the actual profile gas selections and preferences To save a profile press the SAVE button on the Generate Profile tab Ifa specific file name is desired enter it otherwise NAUTILUS will assign a Dive XX number to the saved data Nautilus Dive Planner File Edit Generate Profile Preferences Gas Setup Table Output Nautilus Si DIVE PLANNER To load a dive enter the Manage Profile tab select a particular dive and press LOAD The dive will be loaded back into the Generate Profile ta
17. cal information Following corporate changes at Ocean Systems Inc the task was picked up by Dave Kenyon and Dr Bill Hamilton and they offered decompression services to others in the field From this in about 1975 the need for a number of different tables by a European client led to the idea for Hamilton Research Ltd to provide a program to generate decompression tables instead of just providing the tables themselves That is to sell the goose instead of just the VERSION 1 0 eggs The idea was to design a program that could be used by engineers and diving supervisors as well as researchers and would not need a programmer as such This concept was accepted and DCAP was developed and acquired by several major diving research laboratories A project to develop deep air tables by one of the DCAP users the Swedish Navy led to a highly reliable matrix that later was found to work well for trimix diving also DCAP is the accronym for Decompression Computational Analysis Program Description of the DCAP program Thus DCAP itselfis more a tool for generating and analyzing tables and profiles than it is a specific model The User enters a page of instructions a Basecase file into a PC running DCAP This describes the dive or dives to be done and gas mixes profiles detailed instructions to the diver etc The Basecase also references other files which define other variables such as units the computational model a matrix of ascent li
18. claims to have abandoned VPM his publications and publicity from vendor partners belive this as marketing over substance Wienke apparently still uses core elements of Yount and Hoffman s VPM algorithm as a basis for the RGBM Even today in 2004 it can be demonstrated from commercial programs that the full up RGBM is still underpinned by Yount and Hoffman s iterative algorithm With the wide distribution of open source VPM Wienke was placed under pressure to differentiate his product by customers who had paid for material that could be obtained virtually for free Since 2002 this has resulted in a new RGBM model publicized in dive industry print and venues Nonetheless as demonstrated by the close correlation of ascent data for VPM and RGBM this work has actually only resulted in incremental adjustments of the model You pay your money and you take your chances 27 Nautilus CAN yy DIVE PLANNER Comparison of the VPM to Conventional Decompression Procedures A major difference between the VPM and standard supersaturation algorithms is that the VPM programs use an iterative procedure to calculate a decompression schedule In each step of the iteration a new decompression schedule is calculated The total decompression time is then fed back into the calculation to revise the critical gradients SUB PNEW in the BASIC Programs and a more liberal schedule is produced Maybe this should be called the IGBM
19. d press DIVE 3 Enter the Second Level in the Depth Time boxes and press DIVE 4 Enter the Third Level in the Depth Time boxes and press DIVE As many levels as desired may be entered They can start out with operational descent stops or they can map out the contour ofa deep wreck or cave site The possibilities are endless After the final leg of the dive is entered move to the Decompress section Look at the Ceiling next to the final DIVE button This will be the first stop area PRESS the DECO button and the decompression is calculated DoR Generate Profile Preferences Gas Setup Table Output Compare Manage Profiles Formulary Gas Mixing Help Ofin 230faw10min Dive Depth 180 fey Time minutes Gas Trimix 18 50 Ceiling 0 fsw Deco CNS 02 OfawOmin Depth Time Gas O msl runtime 16 Compart 180 fsw 5 Trimix 18 50 230 fsw Trimix 18 50 180 fsw Trimix 18 50 100 fsw 90 fsw 80 fsw 70 fsw 60 fsw 50 fsw 40 fsw 30 fsw 20 fsw 10 fsw Ofsw Save v Decompress to a depth of 0 breathing All Available Gases v v 7 Hr 30 Min surface interval breathing Air Surface Interval OTU s 15 CMVEM IG SA DIVE PLANNER CREATING PROFILES USING CLOSED CIRCUIT To create dive profiles where the diver will be using a closed circuit rebreather the user needs to 1 Enter the Preferences Tab and change the Scuba Type from Open Circuit to Closed Circu
20. different gas mixes and identify certain facts about them including END CNS OTU RMV PO2 MOD and much more Nautilus yy IVE PLANNER 1 3 7 GAS MIXING Complete calculator for mixing gas either from empty or partially full cylinders Mixing modes include Nitrox using Oxygen and Air Trimix using Helium and Air Helium Oxygen and Air Helium and Nitrox Helium Oxygen and Nitrox Heliox and Air Heliox Oxygen and Nitrox Air Top Ups of Nitrox or Trimix with the ability to add a specific gas so as to change the final composition of the mix A S Nautilus DIVE PLANNER VERSION 1 0 Nautilus Si DIVE PLANNER Nautilus Dive Planner Screen Descriptions 2 1 Opening Screen Nautilus Dive Planner This is an ienpoctant legal notice Allow yourself sufficient time to carefully read and understand the entre document because by accepting you ae agreeing to give up certain legal rights oo In consideration of Scuba Training and Technology Inc heremnalter refered to as Corporations allowing me Ss CAN the privilege of utiieing the NAUTILUS Dive Planner Soltware designed manufactured and or assembled by gt Scuba Traning and Technology Inc for the purpose of performing an intentional underwater ot hyperbaric dive lt 7 agree to the following terms N ti l autiiu 1 Representations Warranties amp Assumptions of Risk DIVE PLAN VE AININ s understand wil be performing an
21. e Computer Inc and Linux X86 w GTK No representa tion is made to the complete compatibility of any hardware or software The names NAUTILUS Dive Planner Software Nautilus Dive Planner and Nautilus are use interchangably throughout this manual and all result in the same meaning website http Awww nautilusdiveplanner com e mail support nautiliusdiveplanner com discussion group http groups yahoo com group nautilusdiveplanner Special thanks to Hamilton Research Ltd R W Bill Hamilton PhD amp David Kenyon National Oceanographic and Atmospheric Administration David Dinsmore Nautilus Dive Planner Software and this Manual are protected under copyright laws worldwide Specifications Subject to Change Without Notice Not Responsible for Typographical Errors 2 VERSION 1 0 ENENG jN IVE PLANNER Table of Contents Important Remarks Concerning the Manual Page 2 Table of Contents Page 3 Important Safety Considerations Page 5 General Information Page 5 1 Product Overview 1 1 Nautilus Dive Planner Overview Page 6 1 2 Nautilus User Versions Page 7 1 3 Nautilus Function Tabs Page 7 1 3 1 Generate Profile Page 7 1 3 2 Gas Setup Page 8 1 3 3 Table Output Page 8 1 3 4 Compare Page 9 1 3 5 Manage Profiles Page 9 1 3 6 Formulary Page 9 1 3 7 Gas Mixing Page 9 2 Screen Descriptions 2 1 Opening Screen Page 10 2 2 Preferences Page 11 2 2 1 Nautilus Standard Defaults Page 12 2 3 Gas Setup Page 13 2 4 Genera
22. e before using Speed Tables The series of schedules can be generated with EITHER the deepest portion of the dive or the longest portion of the dive This is helpful for multi level dives where bail out schedules are desired The user can also generate what if tables to take into account lost decompression gases NAUTILUS outputs to HTML files now which can be viewed in the standard web browser and printed in whatever mode is prefered File Edit Perini z Generate Profile Preferences Gas Setup Table Output Compare Manage Profiles Formulary Gas Mixing Help Generate 1 w schedule s in 3 v Table Format Amplified Nj Output filename minute increments based on the Bailout T ables deepest v stage of the profile No Bail Out v diveSchedule html Gol 21 VERSION 1 0 Nautilus Aa J DIVE PLANNER 2 8 Formulary 2 9 Gas Mixing 2 10 Help These Tabs have not been completed at this time THIS SPACE LEFT BLANK 22 VERSION 1 0 Nautilus Dive Planner Decompression Models 3 1 NAUTILUS DIVE PLANNER DECOMPRESSON MODELS The Nautilus Dive Planner provides an interface into the following decompression algorithms Parallel models Hamilton Kenyon 11 Compartment Parallel TI 11F6 Buhlmann 16 Compartment Parallel ZHL 16a Hamilton Kenyon Bubble Model Buhlman Bubble Model VPM X US Navy 1965 12 Compartment Parallel 3 2 Parallel Model Overview Th
23. e method provided ascent constraints as limiting ratios of partial pressures the ratio of current depth to target depth Because this worked best only for short shallow air dives Workman based ascent constraints on differential pressures A matrix of maximum tolerable gas loadings M values for each compartment at each depth defined the ascent limits the gas loading calculated for each compartment is compared with the limit at each depth and ascent to the next stop is allowed when the loadings in all compartments are less than the M values the loadings decay exponentially as ambient pressure is reduced and gases leave the body Schreiner made this work efficiently for different inert gases by using different half times for each inert gas and summing the loadings in each compartment Haldane used 6 half times others use more Hamilton Kenyon use 11 half times Since many decompression computations are done with Biihlmann s published method it is relevant to compare it with Tonawanda lia Biihlmann uses a similar approach except that instead of a matrix of M values it uses factors a and b for each of the half times these tolerated pressures can be converted algebraically to M values In the faster compartments shorter half times the inert gases are summed and compared with a calculated limit and in longer compartments the different inert gases have different a and b values these are divided proportionally according to the propor
24. e technical diver The computational program identified as the Hamilton Kenyon algorithm uses in our internal terminology the Tonawanda IIa model using Matrix MF11F6 computed with Hamilton Research s DCAP It uses a Neo Haldanian computational algorithm designated Haldane Workman Schreiner Ituses 11 halftime compartments ranging from 5 to 670 min The ascent limiting matrix was developed to permit deep air dives using air decompression without compromising established decompressions from short shallow air dives The development was empirical based heavily on experience but formal statistics were not used to design the matrix Although designed originally for air the algorithm has proven to be highly reliable for dives using oxygen nitrogen helium trimixes DCAP dates back to commercial diving in the 1960 s when the search for offshore oil found commercial diving companies doing heliox diving up to that time only Navy tables were available and they did not meet all needs for offshore diving Dr Heinz Schreiner led a development team at Ocean Systems Inc in both computation and laboratory validation of new heliox tables This was done in collaboration with others some of whom were then the leaders in decompression including Bob Workman Chris Lambertsen Val Hempleman and Albert Bithlmann Schreiner s computational methods were based on Haldane s concepts and they relied heavily on feedback from the field and other empiri
25. ese models simultaneously load all of the theoretical compartments with inert gas at an exponential rate based upon each compartment s half time All models use a value for each compartment that determines its supersaturation gradient The Buhlmann model uses two factors a and b and the other models use a value called M The compartment that has the deepest minimum tolerable ambient pressure is said to be the controlling compartment based upon the compartments inert gas load factored against its allowable amount of supersaturation a and b or M Theoretically as long as the diver does not ascend above the minimum allowable depth no clinically observable decompression illness symptoms are likely to be observed The Buhlmann models are folded into many popular dive autilus TA j IVE PLANNER computers that are made in Europe Interestingly these machines only track eight 8 compartments therefore a NAUTILUS derived repetitive dive profile will be more conservative than a dive computer using what is billed to be the Buhlmann model Buhlmann models track helium loading and allow for the tracking of helium nitrogen loading in the theoretical compartments These methods were first used in manned dives in the early and mid 1960 s The 10 Compartment Parallel 12 Compartment model and US Navy model are based on the calculation methods derived by the Haldane
26. esumed that a diver s body has the ability to tolerate the bubbles Ifthe volume of bubbles exceeds the critical volume the diver is at risk of a pain hit or worse The volume of the gas in bubbles is related to the product number of bubbles x Gradient x growth time The number of growing bubbles 28 VERSION 1 0 is set by the maximum compression encountered on a dive This crushing pressure is related to the deepest depth of the dive as well as the descent rate and gas mixture All of the programs on this site directly relate pCrush to the maximum depth The gradients and bubble growth time are controlled by the ascent schedule with the surface explicitly considered the last decompression stop Rather than using tens or hundreds of arbitrary of parameters to generate ascent schedules the main result of the VPM is the replacement of the ascent limiting matrix of M a b values with only four constants corresponding to measurable physical and physiological quantities In the BASIC programs they are found in SUB DIVEDATA The minimum bubble radius excitable into growth ro r the skin tension of bubble nuclei gamma y the nuclear crushing tension ge and the maximum tolerable volume of bubbles which is proportional to lambda For the hour long time scales treated by this program the nuclear regeneration time see Yount s eq 2 is essentially infinite and hence not used From these constants critical gradients G
27. g between models during a repetitive dive series is not permitted They include Hamilton Kenyon Model DCAP 11 compartment Buhlmann 16 compartment 4 Compartment Serial 10 Compartment Neo Haldanian 12 Compartment Huggins Nafe Variable Permeability Model VPM US Navy 11 Nautilus Va JN DIVE PLANNER Conservatism Slider increase decompression time over the base algorithm from 0 90 Deep Stops Choose from No Deep Stops Pyle Stops or Custom Rule Stops Pyle Stops inserts a 2 minute stop 1 2 way between the maximum depth of the dive and the first required stop Then 1 2 way again between that stop and the required stop and then 1 2 way again until the required stop is reached NAUTILUS credits at the shallow stops when it can for these deep stops Altitude Set the Starting Altitude of the dive in msl mean sea level and set the Post Dive altitude Starting Altitude is where the dive will be conducted from Post Dive Altitude is where the diver will ascend to after the dive is completed This can be used where there is a mountain range the diver must cross after the dive or a non pressurized cabin plane Deco Prefs Max PO2 on deco Set the maximum PO2 desired for the MOD ofthe decompression gases to be used Note that if 1 6 atm PO2 is desired the slider must be set at 1 61 atm PO2 otherwise the gas will not be enabled at the 1 6 atm level This applies to other levels as well For 1 4 atm PO2 set
28. gas mixtures It is the USER S SOLE RESPONSIBILITY to properly record the gas percentages and label the cylinder being analyzed appropriately Improper gas analysis and transferring that improper analysis to the Nautilus Dive Planner Software may produce decompression results that can cause injury disability or death ATTENTION This guide does not purport to be a complete study or presentation on dive planning or decompression planning Users should seek out other additional information for those areas of expertise WARNING USING OXYGEN MIXTURES CONTAINING 16 or LESS OXYGEN CONTENT AT THE SURFACE CAN CAUSE INJURY OR DEATH FROM HYPOXIA Nautilus CA DIVE PLANNER Nautilus Dive Planner Product Overview 1 1 NAUTILUS DIVE PLANNER OVERVIEW Welcome to NAUTILUS Dive Planner Software NAUTILUS is the new generation of Technical Dive Planning Software and the most comprehensive dive planning tool developed during the last few years We are now 15 years into desktop dive decompression software products yet most of the products on the market are limited in their ability to deliver a wide variety of features and functions Many have been homegrown products that have gained cult like loyalty by some users but still lack the full features and variable controls desired by most of today s advanced and technical divers The introduction of NAUTILUS Dive Planner Software is anew approach to planning decompression dives and in the m
29. he trimix diving done during the 1990s or to have tables provided by NOAA during the USS Monitor projects NOAA Trimix 18 50 is based on Hamtilon Kenyon Model or to have a set of tables created ona custom basis by Hamilton Research Ltd Dr Hamilton has created highly reliable tables using the TII 11F6 model for such notable dive operations as Key West Consortium Casadore Project Pillar Project WKPP Andrea Doria Expeditions USS Monitor Expeditions and many others NAUTILUS is fortunate to have been able to liscense the Hamilton Kenyon Model forthe NAUTILUS Dive Planner Software The relationship between R W Bill Hamilton and NAUTILUS co author Joel Silverstein goes back more than a decade The two have worked on many projects together including authoring two texts on oxygen enriched air diving for NAUI and for the YMCA They were co authors of the NOAA Diving Manual sections on Nitrox and Mixed Gas Diving and were the principal and co investigators for the Decompression Survey of Air and Air with Oxygen diving for the US Navy Biomedical Research division Mr Silverstein has relied on the Hamilton Kenyon Model for his personal diving and that of his pojects since 1991 The Hamilton Kenyon Model has been referred to over the years as the DCAP model DCAP is not a model it is a computer analysis program that allows Dr Hamilton to create 24 VERSION 1 0 and model decompression profiles that extend far beyond the uses and needs of th
30. it 2 Set the High Set Point and Low Set Point for the rebreather you are using NAUTILUS ALPHA VERSION assumes binary diluent gases for the calculations when using a CCR Meaning ifyou are using Heliox it assumes you will be using only helium and oxygen and that your unit will adjust the oxygen accordingly with the balance being helium Ifyou are using nitrox then the unit will adjust for the oxygen accordingly with the balance being nitrogen Most CCR divers will have the diluent for helium dives set up as a 17 83 oxygen helium mixture and will have oxygen on board For nitrox dives they will have air 21 79 oxygen nitrogen as the diluent and will have oxygen on board as well NAUTILUS does not presently calculate CCR decompression using trimixture diluents 3 SAC for the Deco Bail Out should off board OC gasses be desired 4 Continue to set the other preferences 5 Press SAVE the preferences are now saved Next enter the Gas Setup Tab Under the Gas Setup Tab the CCR user can deselect all gas mixtures OR can select a bailout gas or off board decompression gasses When gases are either selected or deselected press SAVE and the gas portfolio will be saved 16 VERSION 1 0 ENTER THE CCR PROFILE Select the Generate Profile tab Enter the Depth and Time and select the Setpoint gas in the pull down to the right of the minutes box then press DIVE minutes Gas CCR Heliox High Setpaint v CCR Nit
31. lable Breathing Decompression Travel Mixes section with 14 predefined gas mixtures including air plus the ability to create and save up to 13 more custom mixes Define Custom Mixes allows the user to create specific mixes that can then be added to the Available Mix portfolio A future feature will have the Gas Portfolio linked to the GAS MIXING tab for automatic entry to aid in creating the gas mix routine for actually mixing the gas 1 3 3 TABLE OUTPUT This Tab is where NAUTILUS displays the output of the Dive Profile and allows the user to View Print Export and save the display of the dive Users can choose from Short Table Long Table Schedule Output with variable time and depth Export to Text File Export to HTML VERSION 1 0 1 3 4 COMPARE This feature allows the user to compare separate and distinct profiles This is an outstanding feature for looking at the time depth profiles comparing OC to CCR or for presentation and educational purposes Overlay Mode shows the dive profile graph on top of each other Two Window Mode shows the dive profile graphs stacked one above the other 1 3 5 MANAGE PROFILES Database listing of dive profiles stored in NAUTILUS allows the user to scroll through previously created profiles and to access the data modify and re save if desired 1 3 6 FORMULARY Formulary is the fun screen that allows the user to access tools that will help them look at
32. lar depths selecting maximum PO2 levels choosing stop time or run time inserting micro bubble minimization deep stops and much more This Version of NAUTILUS DIVE PLANNER introduces a wide range of new and exciting features that were previously unavailable to desktop decompression planning With NAUTILUS users are able to make detailed plans and then perform a simulated dive based on that information During the simulation NAUTILUS will track and inform the user of a wide variety of information to help you plan and execute an actual dive NAUTILUS is not intended or designed for the novice SCUBA diver but rather for the experienced diver or a diver who is enrolled in a qualified training course where NAUTILUS is being introduced VERSION 1 0 1 2 NAUTILUS USER VERSIONS Nautilus Dive Planner Software comes in six versions Each is acomplete full working version of NAUTILUS but is limited in the maximum operating depth These depth levels correspond with popular technical diving certification levels We do not limit the purchase of any of the versions except for one The licensee of one version will be able to purchase upgrades to the next depth version Nautilus 70 Maximum Depth 70 fsw 21 msw Nautilus 140 Maximum Depth 140 fsw 42 msw Nautilus 225 Maximum Depth 225 fsw 68 msw Nautilus 330 Maximum Depth 330 fsw 100 msw Nautilus 660 Maximum Depth 660 fsw 200 msw Nautilus RE Maximum Depth 1500 fsw 455 msw We anticipate that
33. mits or M values the format for the table or tables and names other output files to be generated such as graphics or gas loadings a notebook file can keep arecord of what has been done These files use diving and not computer terminology normally English but can be translated into other languages by the user A number of models or algorithms are used by decompression developers and they are still evolving some are better than others All of them that work rely heavily on empirical experience Hamilton Kenyon s experience is greatest with the neo Haldanian Haldane Workman Schreiner model designated Tonawanda IIa incorporated into NAUTILUS as the Hamilton Kenyon Model Haldane s concept was that different parts of the body compartments take up gas at different rates and this is limited by perfusion the blood s ability to carry gas from the lungs to and from the tissues rather than by diffusion around a capillary Uptake and elimination between lung and tissue follows exponential mathematics which means simply that the rate of transfer is proportional to the AS NEV IG TA J DIVE PLANNER difference these rates are defined by half times for each compartment often called tissues but they are not anatomical the time it takes for half the difference to be equilibrated half the remaining difference takes another half time and so on Gas loadings of inert gases are measured in partial pressures The original Haldan
34. mplicated and involves far too many variables that need to be handled by a researcher to make it practical for recreational use This is where NAUTILUS comes in NAUTILUS allows the free swimming diver the ability to create dive excursion profiles with reasonable assurance that the numbers work well NAUITLUS incorporates the Hamilton Kenyon Algorithm derived from Tonawanda lia 3 5 Hamilton Kenyon Bubble Model HKBM The Hamilton Kenyon Bubble Model HKBM isa melding of Haldane s method of calculating inert gas uptake into theoretical compartments Keller s method of summing the partial pressures of multiple inert gas uptake is employed as well In the Hamilton Kenyon Bubble Model the half times for each compartment are taken from the Hamilton Kenyon decompression model that has years of reliable decompression schedule production l Rather than using Workman s M value methodology for determining allowable supersaturation for the theoretical compartments Yount s tiny bubble 26 VERSION 1 0 method of calculating allowable compartment supersaturation is employed Application of Yount s method to Hamilton Kenyon s gas uptake model produces decompression schedules that have initial decompression stops up to twice as deep as conventional dissolved gas models and shallow decom pression stop times that are significantly shorter than dissolved gas models call for The use of Hamilton and Kenyon s compartment half time
35. nts employees sharehoklers and other representatives B Marufacturers designers and suppers of component haedwate and ce software inconpeeated in NAUTILUS that wil be used duning my intertional dive C IH am making my intentional dve at ot neat a dring facility and or dive boat the owners and operators of that facky and ce dive bost as well as their officers deectors agents servarts employees shareholders and other representatives D The owners and lessees if any of the land upon and hrom which the diving and related operations are conducted E Ary other person and or organaation which is of may be bable for any loss or injury to me or my property or my death aneng out of my parbcipstion in any of the actives covered by thes agreement as defined below J OPENING SCREEN The opening screen of NAUTILUS Dive Planner requires When the user clicks the I AGREE button then the the user to read and either AGREE or DISAGREE with program will allow full features and functions Should the the terms and conditions of the use of the program user click I DISAGREE the program will exit Nautilus keeps track of each time the program is launched 10 VERSION 1 0 2 2 Preferences Nautilus Dive Planner File Edit autilus 4 5 IVE PLANNER EOR Generate Profile Preferences Gas Setup Table Output Compare Manage Profiles Formulary Gas Mixing Help Units Table Type Imperial
36. references Gas Setup Table Output Compare Manage Profiles Formulary Gas Mixing Help 110fswimin EAN 36 200faw20min Trimix 15 60 180faw30min Trimix 18 35 Display Mode OfswOmin Alr 10faew12min OfswOmin Alr 20fanw412min O Overlay 2 window 20 VERSION 1 0 2 7 Table Output NAUTILUS allows the user to output the generated dive profile in a variety of formats These formats are generaly refered to as Tables or Schedules A Table is defined as a Schedule for a Single dive NAUTILUS allows for a variety of table formats In the Alpha Version there are four Table Formats available Classic This format follows that of the traditional US Navy type tables Enhanced This format will show a single depth dive and bottom time with one or two time intervals A Detailed table will show The Model Name Table Title saved name Bottom Mix Decompression mixes gas shift depths decompression times oxygen partial pressures and oxygen limits achieved in both CNS and OTU as well as any operational instructions Nautilus Dive Planner Nautilus SI DIVE PLANNER Condensed This format will show a single depth with a series of bottom times in 3 or 5 minute intervals Speed This format is a compact format for printing on small cards and laminating to be carried by the diver Users are strongly urged to print Amplified tables to review all the pertinent data about the div
37. risk If the diver uses the wrong value of the gas mixture he she or the dive computer could calculate insufficient decompression time EAD END PO2 PN2 or oxygen toxicity MOD CNS OTU etc Both situations could result in death or serious injury situations w are marked in this manual with and STOP E Avoid CAUTION E Do not use Nautilus Dive Planner for actual dives which you have not been trained for Nautilus DIVE PLANNER General Information This user s guide is designed to help the certified diver nitrox diver mixed gas diver or rebreather diver to understand the need and application of planning dives that require decompression planning This manual does NOT purport to be a replacement for certification courses in the subject area or will it provide information on how to conduct the operations of a single dive or series of dives Users who utilize the values presented in NAUTILUS accept all risks of use This user s guide will provide information as to the operational use of the NAUTILUS Dive Planner Software program The Nautilus Dive Planner Software is for the trained and certified diver and gas mixing technician Nautilus Dive Planner Software requires that the user analyze and verify BOTH the oxygen and helium content of any gas that will be used prior to completing any dive that has been planned with the Nautilus Dive Planner Software program A complete log should be maintained for all
38. rox High Setpoint breathing CCR Heliox High Setpoint CCR Nitrox Low Setpoint CCR Heliox Low Setpoint breathing After the dive has completed the first leg the user can decide on how the decompression will be completed by selecting the appropriate decompression gases and or a setpoint If the decompression will be with all CCR then the user need only select that set point gas and press DECO The decompression will now be completed Ifan off board decompression gas will be used tell NAUTILUS to decompress to the desired depth or the MOD of the off board decompression gas using the CCR set point then select the off board decompression gas for completion of the decompression eg decompress to habitat depth then complete decompression with OC gas 230 foyy Time 30 minutes Gas ctr Heliox High Setpoint M Decompress to a depth of 2d breathing CCR Heliox High Setpoint v Hr 30 Min surface interval breathing Air v 230 fsy Time 30 minutes Gas ccr Heliox High Setpoint Ooy Decompress to a depth of o breathing Oxygen xi dr 30 Min surface interval breathing Air NAUTILUS will then calculate the decompression accordingly with the gas shift If air breaks were selected then it will calculate those as well VERSION 1 0 Nautilus Dive Planner File Edit Nautilus CA HY DIVE PLANNER Generate Profile Preferences Gas Setup Table Output Compare Man
39. s avoids the extremely aggressive shallow decompression stop times that VPM and RGBM models yield This combination of Hamilton Kenyon and Yount produce decompression schedules that algorithmically call for deep stops rather than arbitrarily adding them into a dissolved gas model and having to pay for it at the shallow end of the schedule The shallow stops are not arbitrarily shortened based upon the intuition of diver s in the field The schedules produced by the Hamilton Kenyon Bubble Model square with the past 15 years of technical diving experience that has yielded the following observations e Dissolved gas models do not produce initial stops at great enough depth Shallow stops called for by dissolved gas models are much longer than necessary e Deep stops arbitrarily added to dissolved gas model add an unwarranted shallow decompression penalty as do adjustments to the M values Buhlman s halftimes used with dual phase bubble models VPM may be slightly too aggressive for field use skin bends are commonly encountered Hamilton Kenyon Bubble Model produces schedules that include stops and times that describe a more linear rather than exponential arc across the depth time matrix yet still take into account the empirically derived compartment halftimes VERSION 1 0 3 6 Variable Permeability Model VPM Dr David Yount created the Variable Permiablilty Model that takes into account the suspiscion that
40. te Profile Page 14 2 4 1 Create Single Square Profile Dive Page 14 2 4 2 Create a Multilevel Profile Dive Page 15 2 4 3 Creating Profiles Using Closed Circuit Page 16 2 4 4 Repetitive Dives Page 18 2 5 Manage Dives Page 19 2 6 Compare Page 20 2 7 Table Output Page 21 2 8 Formulary Page 22 2 9 Gas Mixing Page 22 2 10 Help Page 22 3 Nautilus Dive Planner Decompression Models Page 23 3 2 Buhlmann Model Overview Page 23 3 3 Hamilton Kenyon Model Page 24 3 4 Variable Permeability Model VPM Page 26 3 5 4 Compartment Serial Model Page 28 3 6 Future Models and Integration Page 28 VERSION 1 0 Nautilus we ye DIVE PLANNER yy Q Notes VERSION 1 0 Nautilus Dive Planner Software autilus iie j IVE PLANNER Warnings and Safety Considerations Important Safety Considerations E Ifyou are not educated in the workings of decompression procedures please seek out training from a reputable internationally recognized training agency before using this product E Using pure Oxygen or Oxygen enriched gases Trimix Heliox or any gas mixture that contains an Oxygen content more or less than 21 straight air needs special safety measures and appropriate training Please consider the general safety considerations of using breathing mixtures other than air MH No decompression table program schedule or output can ever assure that you will not be subject to decompression sickness Use of this software is at your own
41. that microscopic voids cavities nuclei exist in water and tissues that contain water before the start of a dive Any nuclei larger than a specific critical size which is related to the maximum dive depth exposure pressure will grow upon decompression The VPM aims to minimize the total volume of these growing bubbles by keeping the external pressure large and the inspired inert gas partial pressures low during decompression Nautilus PN j DIVE PLANNER It is important to note that the total decompression times generated by the simplified VPM were FORCED to be similar to the US NAVY Standard Exceptional Air deco times However much of the decompression time is deeper than the USN depths Presumably a diver would evolve fewer bubbles using a VPM schedule than on the Navy table This is not very stringent once you consider the risky O2 amp bends nature of the old USN exceptional exposure tables Yount and Hoffman might better have forced the times to look like Buhlmann s for conservatism The parameters in the open source code produce BithImann like no stop times and total decompression times between the old USN tables and the Bithlmann tables Why are VPM Decompression Tables so Similar to the RGBM Tables Why have VPM tables always been so similar to Bruce Wienke s RGBM tables Until 2002 this was simply because the RGBM was essentially the same as the VPM for a single decompression dive Even though Wienke
42. tilevel profile and repetitive dives are easily plotted here and the decompression profile is viewed Preferences This is the heart of Nautilus settings Under this tab the user will select Units Imperial or Metric Table Type Stop Time or Run Time method of display Scuba Type Open Circuit Semi Closed Circuit SAC rate in cfm or Ipm Closed Circuit Constant PO2 High Set Point either heliox or nitrox Low Set Point either heliox or nitrox Nautilus JA DIVE PLANNER Decompression Bailout SAC rate Air Breaks No Air Breaks Classic Air Breaks Custom Air Breaks Rule Decompression Models Hamilton Kenyon Model DCAP 11 compartment Buhlmann 16 compartment 4 Compartment Serial DCIEM 10 Compartment Neo Haldanian 12 Compartment Huggins Nafe Variable Permeability Model VPM US Navy Conservatism Slider Bar 0 90 Deep Stops No Deep Stops Pyle Stops Custom Rule Stops Altitude Starting Altitude Post Dive Altitude Deco Preferences Max PO2 on Deco 16 bar atm 2 0 bar atm Shallowest Deco Stop 10 40 fsw 3 12 msw Avoid Stops at 10 20 30 40 fsw 3 6 9 12 msw Avoid Stop at custom depth 8 VERSION 1 0 Deco Stops Intervals 10 30 fsw in 1 foot increments Reset This resets all changes to the Preference Screen to the base defaults Save This saves the preferences set for use now and until it is reset 1 3 2 GAS SETUP The GAS SETUP screen is divided into two sections Avai
43. tion of each inert gas in the mix Both methods can vary in their conservatism but in present practice the Tonawanda lia model using the matrix described identified as MM11F6 Hamilton Kenyon is a bit more conservative that the unmodified BiihImann method This combination has worked well with trimix dives The most popular use of the MM11F6 matrix has been for the well known Key West Consortium Trimix Diving Tables the 25 Nautilus wa JN DIVE PLANNER NOAA Trimix Diving Tables and the Andrea Doria Off Shore Diving Tables These tables have thousands of dives experience with very good results This is the model included in NAUTILUS Thus to wrap up DCAP is a practical result of many years of collective experience in preparing and evaluating many types of decompression tables The DCAP concept does not limit it to calculations with any specific model there is currently a choice of several models and others are under development DCAP s main feature is that it facilitates the computational and table production process It can allow different models approaches ascent constraints and table configurations to be used A good set of criteria provides a practical approach to trimix decompression in the self contained open circuit range with a good track record While it would be wonderful for DCAP to be an inexpensive desktop decompression program it just can t The powerful features of DCAP make it far too co
44. underwater ot hyperbaric dive which wil expose me to the risk of personal nguy property damage and or death understand that the success of my dive is dependent upon the perfect Nautilus 0 01 Dive Planner functioning of the equipment intend to use the NAUTILUS software my person physical condition and the Alpha Team Evaluation Copy accuracy of the data I provided to NAUTILUS to create the dive plan I intend to follow and that neither my Ttan Version Bu March equipmers nor the NAUTILUS software noe my physical body noe my data nor my tended dive plan can be Quaanteed to function perlectly understand that the equipment the NAUTILUS software my data my Deemed ie Dan Nate and physical body and my dve plan are subject to mechanical malfunction as well as operator enor keel voluntarily and expressly choose to assume all risks inherent in diving inchading bul not imted to risks of equipment amp software malfunction and ce fadure including those which may result from some design assembly and or manulacture as wel as those msks ansing from impeoper and ce neghgent operation and ce use of the equipmert amp soltware for the thrill of participating m thes activity understanding full well that those risks may inchide personal injury property damage and or death 2 Exemption and Release from Liabaity exempt and releace the folowing persons and ceganizatioris A The Corporations and thes officers directors agerts serva
45. x CCR Heliox CCR Heliox CCR Heliox CCR Heliox CCR Heliox CCR Heliox CCR Heliox CCR Heliox CCR Heliox CCR Heliox CCR Heliox CCR Heliox CCR Heliox Oxygen Oxygen vi Ceiling 0 fsw m Surface Interval OTU s Creating multi level dives with CCR is no different than when they are created with OC modes of diving Simply select each level desired and press the DIVE button until the dive is completed then press DECO with the desired decompression Setpoint or off board gases as discussed earlier 17 VERSION 1 0 Nautilus N DIVE PLANNER Ei 2 4 4 REPETITIVE DIVES After the Surface Interval is entered press the AUTIL t titi i ith relati NAU TS Cerat a te ee SURFACE INTERVAL button and the surface interval After the user has set up Preferences and Gas Setup return to the Generate Profile tab WA peeraa Create the first dive as described earlier indicating depth Next enter the new dive with the new gas mixes if and time and the bottom gas to be used Then complete changed and complete the dive as normal Ifa third dive the decompression After the decompression is complete is desired or a series of dives is desired repeat the enter the SURFACE interval in Hours and Minutes For repetitive dive process purposes ofthis illustration select AIR as the surface interval gas Note NAUTILUS will allow for Surface intervals using gases other than AIR
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