User manual OCEANIC DATA 100

Data 100 ® owner's guide DATA100 RESPONSIBLE COMPUTER DIVING x Always Plan Each Dive x Always Limit Your Dive to the Level of Your x x x x x x Training and Experience Always Make Your Deepest Dive First Always Make The Deepest Part Of Every Dive First Check Your Computer Often During the Dive Do A Safety Stop On Every Dive Allow Adequate Surface Interval Between Each Dive Allow Adequate Surface Interval Between Each Day Of Diving (12 Hours Or Until Your Computer Clears) Read And Understand This Owner's Guide Thoroughly Before Using the Data100. Responsible iii Pay special attention to items marked with this Warning symbol. WARNINGS: · The Data100 is intended for use only by recreational divers who have successfully completed a nationally recognized course in scuba diving. · It is intended only for no decompression diving, NOT intentional decompression diving. · It must not be used by untrained persons who may not have knowledge of the potential risks and hazards of scuba diving. · You must obtain scuba certification before using the Data100 if you have not already done so. · It is NOT for use by military and commercial divers. · It should NOT be utilized for any competitive, or repetitive square wave or decompression diving, as it is intended solely for recreational use and no decompression multilevel diving. · As with all underwater life support equipment, improper use or misuse of this product can cause serious injury or death. · Never participate in sharing or swapping of a dive computer. · Conduct your dives in such a manner so as to insure that you continuously check the computer's proper function. · Read and understand this owner's guide completely before diving with the Data100. · If you do not fully understand how to use this dive computer, or if you have any questions, you should seek instruction in its use from your authorized Oceanic dealer before you utilize this product. iv DATA100 LIMITED TWO-YEAR WARRANTY Oceanic guarantees, to the original purchaser only, that the Data100 will be free of defects in materials and/or craftsmanship under normal recreational multilevel scuba use for two years from date of purchase, provided proper care and annual service are performed as described within this owner's guide. Should your Data100 prove to be defective for any reason (other than those listed in the limitations section below) it will be repaired or replaced (at Oceanic's discretion) free of charge excluding shipping and handling charges. This warranty will be considered void if the registration card is not filled out completely at the time of purchase and mailed to Oceanic within 30 days of purchase, and/or if the annual inspection is not done according to this owner's guide. This warranty is non-transferrable and applies to the original purchaser only. All correspondence concerning this warranty must be accompanied by a copy of the original sales receipt and a copy of the owner's portion of the warranty registration card including the annual inspection record. Once each year you must return the Data100 to an Authorized Oceanic Dealer within 30 days of the original purchase date anniversary to keep the two year limited warranty in force. Annual inspection includes verification of depth accuracy and proper general function. Labor charges for the annual inspection are not covered by the warranty. You must provide a copy of the original sales receipt and a copy of the owner's portion of the warranty registration card including the annual service record to obtain warranty service. Statement of Limitations - General: Warranty does not cover damage from accident, abuse, battery leakage, tampering, lack of proper care and maintenance and/ or proper annual servicing, or improper use of the Data100. Modifications or repair by anyone other than an Oceanic Sales & Service Center authorized to service the Data100 will void the warranty. Oceanic will not be responsible for recovery or replacement of the product in the event of loss or theft. Oceanic, its distributors, and retailers make no warranties, either expressed or implied, with respect to this product or its owner's guide except those stated in the preceding paragraphs. In consideration of the sale of the Data100 to you, you agree and understand that in no event will Oceanic, its distributors or retailers, be held liable for any personal injuries resulting from its operation, or for any other damages whether direct, indirect, incidental, or consequential even if Oceanic is advised of such damages. Some states do not allow the exclusion or limitation of implied warranties or liabilities for incidental or consequential damages, so the above limitation may not apply to you. Warranty does not extend to plastic gauge face, o-rings, batteries, or damage due to accident, abuse, modification, or tampering. v COPYRIGHT NOTICE This owner's guide is copyrighted, all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine readable form without prior consent in writing from Oceanic / 2002 Design. * The Surface Time/Mode, Plan Mode, No Decompression Time, Decompression Stop Time, Dive Log, Low Battery, Bottom Time, Maximum Depth, Ascent Rate, and Caution Zone icons are protected by copyright, and are trademarks of Oceanic. Data100 Owner's Guide, Document Number 12-1966 © 2002 Design 1996 2002 Davis Street San Leandro, Ca. USA 94577 510/562-0500 TRADEMARK NOTICE Oceanic, the Oceanic logo, Data100, the Data100 logo, Oceanglo, DataLog, DataLink, Diving Essentials Redefined, Graphic Diver Interface, Tissue Loading Bar Graph, Pre Dive Planning Sequence, and Variable Ascent Rate Indicator are all registered and unregistered trademarks of Oceanic. All rights are reserved. PATENT NOTICE U.S. Patents have been issued, or applied for, to protect the following design features: Graphic Diver Interface, Pre Dive Planning Sequence, Data Sensing and Processing Device (U.S. Patent no. 4,882,678), Tissue Loading Bar Graph (U.S. Patent no. 4,882,687), and Variable Ascent Rate Indicator Bar Graph (U.S. Patent no. 5,156,055). DECOMPRESSION MODEL The programs within the Data100 simulate the absorption of nitrogen into the body by using a mathematical model. This model is merely a way to apply a limited set of data to a large range of experiences. The Data100 dive computer model is based upon the latest research and experiments in decompression theory. Still, using the Data100, just as using the U.S. Navy (or other) No Decompression Tables, is no guarantee of avoiding decompression sickness, i.e. "the bends." Every diver's physiology is different, and can even vary from day to day. No machine can predict how your body will react to a particular dive profile. * The blank Oceanic DiveLog in the Reference section may be duplicated for personal use only, not for resale. vi DATA100 CONTENTS THE DATA100 IS EASY TO USE ...................................................................... 1 Introduction ....................................................................................................... 2 Regulator Attachment .................................................................................................. 4 Activating the Display .................................................................................................. 4 Making a Dive ............................................................................................................... 5 After the Dive ............................................................................................................... 8 Knowing When to Fly ................................................................................................... 9 Altitude Diving ........................................................................................................... 10 LCD Display Legend ........................................................................................ 11 Operational Displays ....................................................................................... 12 DETAILED OPERATIONS GUIDE ................................................................ 13 Informational Displays ................................................................................... 14 Depth Display ............................................................................................................. 14 Time Display ............................................................................................................... 15 Graphic Diver InterfaceTM ............................................................................... 16 Tissue Loading Bar Graph® (TLBG) ......................................................................... 16 Variable Ascent Rate IndicatorTM (VARI) .................................................................. 17 vii CONTENTS (CONTINUED) Operational Modes .......................................................................................... 18 Activation & Diagnostic Mode ................................................................................... 18 Surface Mode .............................................................................................................. 20 Pre Dive Planning SequenceTM (PDPS) ..................................................................... 21 No Decompression Dive Mode ................................................................................... 22 Decompression Dive Mode ......................................................................................... 24 Violation Modes .......................................................................................................... 27 Gauge Mode ................................................................................................................ 27 Ascending to the Surface ............................................................................................ 27 Dive Log Mode ............................................................................................................ 28 Time to Fly Mode ........................................................................................................ 30 External Access Mode (EA) ........................................................................................ 31 Backlight Feature ............................................................................................ 32 HANDLING THE EXTREMES ........................................................................ 33 Emergency Decompression ............................................................................ 34 Caution Zone (TLBG) ...................................................................................... 36 Exceeding Maximum Operating Depth ........................................................ 37 Violation Modes ................................................................................................ 39 Conditional Violation Mode ....................................................................................... 39 viii DATA100 CONTENTS (CONTINUED) Delayed Violation Mode .............................................................................................. 40 Immediate Violation Mode ......................................................................................... 42 Gauge Mode ................................................................................................................ 43 Permanent Violation .................................................................................................. 44 Unexpected Loss of Displayed Information ................................................. 44 Sharing the Data100 ........................................................................................ 45 Operating Temperature .................................................................................. 45 CARE & MAINTENANCE ................................................................................ 47 Care and Cleaning ........................................................................................... 48 Annual Dealer Inspections & Factory Service ............................................ 50 Obtaining Factory Service .............................................................................. 51 Battery Life ....................................................................................................... 52 Low Battery Condition ................................................................................... 53 Battery Removal ......................................................................................................... 53 Battery Installation .................................................................................................... 55 Flooded Battery Compartment .................................................................................. 56 Inspection .................................................................................................................... 57 Returning the Module To Its Boot ............................................................................. 57 ix CONTENTS (CONTINUED) REFERENCE .................................................................................................... 59 More About Flying After Diving .................................................................... 60 More About Altitude Diving ........................................................................... 61 Multiple Tissue Tracking ................................................................................ 62 No Decompression Limits ............................................................................... 64 Maximum No Decompression Dive Profile .................................................. 64 Decompression Violation Limits ................................................................... 67 Repetitive Decompression Diving ................................................................. 67 Responsible Computer Diving ....................................................................... 69 Specifications ................................................................................................... 70 Dive Log ............................................................................................................ 73 Glossary ............................................................................................................. 74 Index .................................................................................................................. 77 Data100 Service Record .................................................................................. 80 x THE DATA100 IS EASY TO USE INTRODUCTION Welcome to Oceanic and thank you for choosing the Data100! Your new Data100 presents the information that you need before, during, and after your dives using Oceanic's intuitive combination of easy to read digital displays and unique identification icons. Tissue loading of nitrogen and ascent rate are presented as segmented bar graphs alongside color coded reference indicators that bring quick focus to these two important status displays. As you progress through this instructional guide, you will become familiar with all of the unique functions and features available and see examples of the displays that you could expect to see in the Data100's various operational modes. The initial time that you invest becoming acquainted with your new Data100 will be returned as you enjoy your underwater activities with the comfort that your familiarization affords. The Data100's wide array of features are described in detail throughout the pages that follow. Due to the importance that they be understood thoroughly prior to using the Data100, some information will be refreshed as you proceed. Relax and read through the complete guide. Know your Data100! DATA 100 DATA 100 GLO 2 It is extremely important that you: · Read this owner's guide in sequence and understand it completely before attempting to use the Data100. · Check the Data100 frequently during your dive. · You must also be a trained diver, certified by a recognized training agency. Remember that the rules you learned in your basic scuba certification course still apply to the diving you will do while using a dive computer - some will become even more important. Technology is no substitute for common sense, and a dive computer only provides the person using it with data, not the knowledge to use it. Be a RESPONSIBLE DIVER at all times. Data100 WARNING: Inspect your Data100 prior to every dive, checking for any signs of the entrance of moisture, damage to the button membrane, or damage to the LCD display. If these or other signs of damage are found, return the unit to an Authorized Oceanic Dealer or Oceanic Parts & Service. DO NOT attempt to use until it has received factory service. O N S IB L E DI VER RESP 3 REGULATOR ATTACHMENT b If you have purchased the Data100 in a console version, you will need to have it attached to your regulator first stage by an Authorized Oceanic Dealer. ACTIVATING THE DISPLAY DATA 100 a GLO Fig. 1 - Surface Mode a FT You activate the Data100 by pressing and releasing the control button located below the display (Fig. 1a). Depressing the button during the Dive Mode will activate the display's OceangloTM backlight. After a diagnostic check that lasts about 10 seconds, it enters the pre dive Surface Mode signified by the Surface Mode icon (Fig. 1b). Also displayed will be the number "0" indicating that no dive has been made since activation. The surface time display will start counting up from 0:00. If no dive is made within 2 hours (2:00), the unit will automatically shut off. After displaying the Surface Mode for approximately 10 seconds, the Data100 automatically changes to a Plan Mode (Fig. 2) referred to as the Pre Dive Planning Sequence or PDPS signified by the PDPS icon (Fig. 2a). The PDPS displays a sequence of depths from 30 to 160 feet (9 to 48 meters) in 10 foot (3 meter) increments. Each depth is displayed with its corresponding available adjusted no decompression limit for 3 seconds. Upon completion of the Sequence, the Surface Mode is displayed, then the PDPS, etc. DATA 100 GLO Fig. 2 - Pre Dive Planning Sequence 4 WARNING: The Data100 must be manually activated and be in the Surface Mode or PDPS Mode prior to start of a dive. The unit will not activate automatically by immersion in water. MAKING A DIVE Once you enter the water and descend to a depth below 5 feet (1.5 m)., the Data100 changes to the No Decompression Dive Mode (Fig. 3) signified by the No Decompression icon (Fig. 3a). Displayed are current depth, elapsed dive time (and the Elapsed Dive Time icon), no decompression dive time remaining, maximum depth reached during the dive (and the Max Depth icon), nitrogen loading (as the Tissue Loading Bar Graph), and ascent rate (as the Variable Ascent Rate Indicator bar graph). To make it easy to check your dive status on the Data100, a color coded system of graphic displays is used for representation of tissue nitrogen loading and ascent rate. This Graphic Diver InterfaceTM (Fig. 4) consists of two segmented bar graphs appearing alongside green, yellow and red perimeter sections that signify normal, caution, and danger zones, respectively. When underwater, you can quickly focus on the two bar graphs and making sure that they are in the green. You can quickly verify that you're not getting too close to the no decompression limit or ascending too fast. Data100 a FT DATA 100 GLO Fig. 3 - No Decompression Dive Mode DATA 100 GLO Fig. 4 - Graphic Diver Interface 5 DATA 100 The Tissue Loading Bar Graph® (Fig 5) represents nitrogen loading, showing your relative no decompression or decompression status. As your depth and bottom time increase, segments will fill the graph to form an arc around the perimeter of the LCD. As you ascend to shallower depths, this bar graph will begin to recede, indicating that additional no decompression time is allowed for multilevel diving. The TLBG also assists you with managing decompression by indicating six red 'ceiling' stop depths. This is explained in detail in the Handling the Extremes section. GLO Fig. 5 - Tissue Loading Bar Graph (TLBG) The TLBG gives a visual representation of just how close you are to the no decompression limit (the 12 o'clock position of the TLBG) with a yellow Caution Zone (Fig. 5a). This Caution Zone portion of the TLBG allows you to make a decision regarding safety stop duration or necessity. While you cannot provide a guarantee against the occurrence of decompression sickness, you may choose your own personal zone of caution based on age, physique, excessive weight, etc., to reduce the statistical risk. When rising towards the surface, the Variable Ascent Rate IndicatorTM (Fig. 6) shows how fast you are ascending. The Variable Ascent Rate Indicator (VARI) will alert you with flashing segments if you enter the red zone, which represents ascent rates faster than 60 feet (18 meters) per minute. Immediately slow your ascent whenever this is seen. Even if you have not entered decompression, a safety stop made between 15-20 DATA 100 GLO Fig. 6 - Variable Ascent Rate Indicator (VARI) 6 feet (5-6 meters) is strongly recommended as a standard procedure before completing your ascent. Many divers do this to provide a wider zone of caution from the no decompression limit. If your depth or bottom time is such that the TLBG enters the red zone, the Data100 will switch to the Decompression Dive Mode (Fig. 7) signified with the flashing Decompression Dive Mode icon (Fig. 7a). A decompression stop ceiling will be indicated by the TLBG, and the Stop Ceiling icon (Fig. 7b). Digital displays are current depth, current required decompression stop depth and time for that stop depth, and total required ascent time to the surface, that includes total required decompression stop times and vertical ascent time calculated for a rate of 60 feet (18 meters) per minute. You must stay at, or slightly below, the ceiling stop depth indicated until the TLBG recedes into the next shallower zone before ascending any further, or you will increase your risk of decompression sickness. After displaying the Decompression Dive Mode for 12 seconds an Alternate Display (Fig. 8) appears automatically for 3 seconds. The two displays will continue to alternate while you are in the Decompression Dive Mode. The alternate display replaces required stop depth and time information with maximum depth and elapsed dive time. Also, the Stop Ceiling icon is replaced by the Max Depth (Fig. 8a) and Elapsed Dive Time icons (Fig. 8b). Data100 a FT DATA 100 GLO b Fig. 7- Decompression Dive Mode FT a DATA 100 GLO b Fig. 8- Decompression Dive Mode - Alternate Display 7 AFTER THE DIVE After reaching 3 feet (1 meter) upon ascent, the Surface Mode display (Fig. 9) will replace the Dive Mode display. After 10 minutes in the Surface Mode, and at once each minute afterward, the Surface Mode display will alternate with the Pre Dive Planning Sequence (PDPS). The PDPS will show 'adjusted' no decompression limits based on the nitrogen calculated to have been absorbed during your last dive. Calculated dive times displayed by the PDPS will increase as the real time surface interval increases after completion of a dive. Immediately after a dive, various information is stored in the Data100's memory and can be viewed by accessing the Dive Log Mode (Fig. 10). This gives you a opportunity to record it in your log book before it is eventually overwritten by subsequent data. Your latest 12 dives are stored and can be viewed by pressing the control button. Dive Log Mode signified by the Dive Log icon (Fig. 10a) will automatically scroll through the latest 12 dives, starting with the most recent dive first. The Log displays the dive number (#), surface interval prior to the dive, maximum depth (and Max Depth icon), elapsed dive (bottom) time (and Elapsed Time icon), and maximum ascent rate (VARI) attained at any time during the dive. It also displays end of dive tissue loading (TLBG). This is handy when making decisions regarding subsequent dive planning. DATA 100 GLO Fig. 9 - Surface Mode a DATA 100 GLO Fig. 10 - Dive Log Mode 8 KNOWING WHEN TO FLY Due to the present lack of a complete data set derived from actual human testing, there are different recommendations cited by various scientific organizations for the amount of time a diver should wait before flying after diving. The Data100 follows one of the more conservative of these, cited by Divers Alert Network (DAN); that divers wait at least 12 hours before flying in pressurized commercial aircraft, and at least 24, or more, hours if your profiles included repetitive multi-day or decompression dives. More about flying after diving and DAN's guidelines is presented on page 54 in the Reference section. The Data100 tracks how much surface time has elapsed since you surfaced from your latest dive. The Time to Fly Mode begins a 24 hour countdown that starts 10 seconds after a dive. During the first 12 hours, the countdown appears for several seconds at the beginning of the PDPS (Fig.11). During the second 12 hours of the countdown, only the word FLY and the counter will be displayed (Fig. 12). During this second period, depressing the control button will reactivate the Data100, replacing the Time to Fly countdown with the Surface Display and scrolling PDPS. WARNING: Battery removal and replacement will clear the Time to Fly countdown Data100 DATA 100 GLO Fig. 11 - Time to Fly Mode (First 12 hours) DATA 100 GLO Fig. 12 - Time to Fly Mode (Last 12 hours) 9 ALTITUDE DIVING The mathematical model within the Data100 accounts for the reduced No Decompression time available at higher elevations based on NOAA (National Oceanic and Atmospheric Administration) guidelines. When diving in high altitude lakes or rivers from 2,000 to 14,000 feet (610 to 4,268 meters), the Data100 will adjust automatically, providing corrected depth and reduced No Decompression times. Also, when above 2,000 feet (610 meters), depth calibration of the unit is automatically changed to read in feet of freshwater rather than feet of seawater. The Data100 will not activate at altitudes above 14,000 feet (4,268 meters). More about altitude diving and NOAA guidelines is presented on page 55 in the Reference section. VER O N S IB L E DATA 100 DI RESP GLO WARNING: Until it has shut itself off, you must not use the Data100 at a different altitude than the altitude where it was originally activated. Doing so will result in an error equal to the difference in barometric pressure, and possibly a false dive mode with erroneous data. Battery removal and replacement will cause the Data100 to reset. 10 Data100 2 3a 3b 1. 2. 3a. 3b. 3c. 3d. 3e. 3f. 4a. 4b. 4c. 5. 6. 7. 8. 9. 10. 11. 12. Tissue Loading Bar Graph (TLBG) (Green - No Decompression zone) TLBG - (Yellow - Caution zone) TLBG - (Red - 10 foot/3 meter stop ceiling) TLBG - (20 foot/6 meter stop ceiling) TLBG - (30 foot/9 meter stop ceiling) TLBG - (40 foot/12 meter stop ceiling) TLBG - (50 foot/15 meter stop ceiling) TLBG - (60 foot/18 meter stop ceiling) Variable Ascent Rate Indicator (VARI) (Green zone - rate safe) VARI - (Yellow zone - rate excessive) VARI - (Red zone - rate Too Fast) Icon - Operating Mode - (See Detail A) Icon - Low Battery Icon - Log Mode Icon - Elapsed Bottom Time Icon - Deco Stop Ceiling Control Button Infrared Interface Ports (Factory Use) Icon - Maximum Depth 7 6 M FT 3c 5 3d 3e 1 12 4a 11 4b 10 4c 9 LCD Display Legend DATA 100 GLO 3f 8 Detail 'A' - Operating Mode Icons Surface PDPS No Deco Dive Deco Dive 11 Surface Mode PDPS Dive Log Mode Time to Fly FT DATA 100 GLO DATA 100 GLO DATA 100 GLO DATA 100 GLO FT FT FT FT DATA 100 GLO DATA 100 GLO DATA 100 GLO DATA 100 GLO No Deco Dive Deco Dive Deco - Alt Display Conditional Violation Operational Displays 12 DETAILED OPERATIONS GUIDE a FT INFORMATIONAL DISPLAYS Each Data100 numeric or graphic display represents a unique piece of information. It is imperative that you understand the formats, ranges, and values of the information represented by the Data100's displays to avoid any possible misunderstanding that could result in error. This section describes each display in detail. Depth Display During a dive, the Current Depth display, located in the upper portion of the LCD (Fig. 13a), indicates depths from 0 to 330 feet (99.5 meters) in 1 foot (.5 meter) increments. In the event that you descend deeper than 330 feet (99.5 meters), this display will show three dashes to indicate, until you ascend to 330 feet (99.5 meters) or shallower, that you have gone 'out of range'. In the Surface or Dive Log modes, the Dive Number replaces the current depth display. A second depth display located in the lower left portion of the LCD (Fig. 13b) indicates the Maximum Depth reached during that dive. In the event that you descend deeper than 330 feet (99.5 meters), this display will only show three dashes for the remainder of that dive and as the Max Depth in the Dive Log for that dive. During a Decompression Dive the required Ceiling Stop Depth replaces the Maximum Depth display (Fig. 13c). However, Maximum Depth will appear for 3 b DATA 100 GLO (No Decompression Mode) FT c DATA 100 GLO (Decompression Mode) Fig. 13 - Depth Displays 14 DATA100 seconds when the screen toggles to the Alternate display once every 15 seconds while in the Decompression Mode. Time Display The Main Time display, located in the center of the LCD (Fig. 14a), indicates elapsed Surface Time, theoretical Dive Time Available during the PDPS, No Decompression Dive Time Remaining, or Total Ascent Time required depending on the mode that the Data100 is in at the time. A second time display, located in the lower right portion of the LCD (Fig. 14b), indicates Elapsed Dive (bottom) Time, or Decompression Stop Time for the current stop ceiling indicated as identified by the Elapsed Dive Time and Ceiling Stop icons, respectively. Time displays are shown in hour:minute format (i.e. 1:06 represents one hour and six minutes, not 106 minutes!). The colon that separates hours and minutes blinks once per second when the display is indicating real time such as elapsed Surface Time or Dive (bottom) Time. Dive Time Available, No Decompression Dive Time Remaining, or Total Ascent Time required are calculated projections of time and use a solid (non-blinking) colon to indicate that they is counting down, rather than counting up. a FT DATA 100 GLO b Fig. 14 - Time Displays 15 GRAPHIC DIVER INTERFACETM Two bar graphs referred to as the Graphic Diver InterfaceTM are located around the perimeter of the Data100's LCD. They are color coded green, yellow, and red to denote normal, caution and danger zones, respectively. The Graphic Diver Interface allows you to make quick status checks underwater of your no decompression status and ascent rate. Keeping these bar graphs in the green at all times will reduce your exposure to decompression sickness and the effects of an excessive ascent rate. Tissue Loading Bar Graph® (TLBG) The Tissue Loading Bar Graph® (TLBG) represents nitrogen loading, showing your relative no decompression or decompression status. As your depth and bottom time increase, segments will add to the graph in an arc beginning from the lower left. As you ascend to shallower depths, the TLBG will begin to recede, indicating that additional no decompression time is allowed for multilevel diving. The TLBG also assists you with managing decompression by indicating six 'ceiling' (stop) depths, which are explained in more detail in the Handling the Extremes section. The TLBG, located around the outside edge of the LCD (Fig. 15), monitors 12 different nitrogen compartments simultaneously and displays the one that is in control of your dive. It is divided into a green No Decompression zone, a yellow Caution zone, and a red Decompression zone. The red Decompression zone is DATA 100 GLO Fig. 15 - TLBG 16 DATA100 further divided into 6 Decompression 'ceiling' zones representing 10FT/ 3M, 20FT/ 6M, 30FT/ 9M, 40FT/ 12M, 50FT/ 15M, and 60FT/ 18M stop depths. WARNING: Oceanic advocates responsible diving practices consistent with your individual level of formal training and experience, and does not recommend decompression diving or diving below 130 feet (39 m). Variable Ascent Rate IndicatorTM (VARI) The Variable Ascent Rate IndicatorTM (VARI), located along the bottom of the LCD screen (Fig. 16), is provided to help you to avoid excessive ascent rates by providing a visual representation of ascent speed, rather than just showing that you are ascending too fast. The LCD displays 5 triangular segments, beginning from the left side, that may be considered an ascent rate speedometer. The actual speeds that the VARI segments represent are shown above Fig. 16. When your ascent rate exceeds 60 feet (18 meters) per minute, the VARI segments will enter the red zone and flash once per second until your ascent speed is slowed. A legend of the LCD is provided at the end of this section Ensure that you are familiar with all displays prior to using your Data100. Segments = Speed 0 = 0 to 20 fpm (0 to 6 mpm) 1 = 21 to 30 fpm (6.5 to 9 mpm) 2 = 31 to 40 fpm (9.5 to 12 mpm) 3 = 41 to 50 fpm (12.5 to 15 mpm) 4 = 51 to 60 fpm (15.5 to 18 mpm) 5 = 61+ fpm (18.5+ mpm) DATA 100 GLO Fig. 16 - VARI 17 OPERATIONAL MODES Icon a - operating (Dive) mode b - Low Battery warning c - Dive Log mode d - Ceiling (Deco Stop) e - Elapsed Dive Time f - Maximum Depth The Data100's different operating modes are easy to tell apart. Each is clearly identified with graphic mode icons (Fig. 17) which provide quick visual reference during the various modes of operation. Become familiar with all modes so that you understand exactly what information the Data100 is providing you at any specific time. Above water modes include - Diagnostic Mode, Pre Dive Planning SequenceTM (PDPS), Surface Mode, Dive Log Mode, and Time to Fly Mode. Diagnostic and Dive Log Modes are accessed by pressing the control button. d Underwater modes include the No Decompression Dive Mode, Decompression Dive Mode and Alternate Decompression Dive Mode, Violation Mode, and Gauge Mode. You will not see Decompression Dive, Violation, or Gauge Modes unless you dive to extremes. Activation & Diagnostic Mode b a c f DATA 100 e GLO WARNING: Never activate the Data100 underwater. This may result in inaccurate depth and no decompression time displays. Activation is not possible deeper than 4 feet (1.5 meters) underwater, or at elevations higher than 14,000 feet (4,267 meters). For Activation, refer to the explanation given on page 4. Fig. 17 - Icons 18 DATA100 Diagnostic Mode is displayed immediately following activation. After pressing and releasing the control button, the Diagnostic Mode will display all "8's" followed by dashes, and then a countdown from 9 to 0 (Fig. 18). During the countdown, the Data100 checks its display functions and battery voltage to ensure everything is working properly, then changes to the Surface Mode. If battery voltage is below the level sufficient for a day's operation, the Battery icon will be displayed, flashing. Below 15% of rated voltage all graphic displays will shut off except the Battery icon that will flash 16 final times prior to shutdown of the Data100. See page 53 for more information regarding Low Battery. WARNING: If a Low Battery condition is indicated immediately upon activation, Oceanic strongly recommends that you DO NOT dive until batteries are replaced. If the flashing Low Battery icon disappears and the unit stays on implying satisfactory voltage, DO NOT dive until batteries are replaced. This could occur if the button is depressed for greater than 8 seconds and the unit enters an External Access (EA) mode. If a dive is not made within 2 hours after activation, the Data100 will shut off automatically to save battery power. Always check your Data100 before entering the water to ensure that it has been activated. M FT DATA 100 GLO Fig. 18 - Diagnostic Mode 19 Surface Mode Surface Mode, identified by the Surface Mode icon to the left of the Surface Time display, immediately follows Diagnostic Mode after initial activation. Information provided includes, the number of the most recent dive made ('0' if no dive has been made since activation), elapsed Surface Time with the colon flashing, and tissue (nitrogen) loading, if any, as the TLBG. At the end of a dive, when you ascend to 3 feet (1 meter) or shallower, the Data100 will automatically enter Surface Mode (Fig 19) and begin counting your Surface Interval. This first 10 minutes is in affect, a transition period: · The main Time display will start to count Surface Interval with the colon flashing. · The Dive Mode icon will be replaced by the Surface Mode icon that will flash indicating post dive Surface Mode transition. · The previous Dive Number will appear above the Main Time display. · The TLBG will indicate current nitrogen loading. DATA 100 GLO Fig. 19 - Surface Mode (First 10 minutes) If you descend during that first 10 minute transition period, time underwater will be considered a continuation of that dive. The time at the surface (if less than 10 minutes) will not be added as bottom time. During the 10 minute transition period, the Log Mode is accessible and will display that dive'sdata, however, it will not be stored in the unit's memory until the 10 minute period is 20 DATA100 completed. The PDPS will not appear until after the first 10 minutes. Once 10 minutes have elapsed, the Surface Mode icon stops flashing. Other information will continue to be displayed as described above. Time to Fly will appear once per minute at the beginning of the PDPS. That dive will then be entered into the memory of the Log Mode, and a subsequent descent will be considered a new dive. Pre Dive Planning SequenceTM (PDPS) Prior to every dive, Oceanic strongly recommends that you view the PDPS to review the no decompression limits that will help you plan your dive as required to avoid decompression. This is especially important for repetitive dives, when the PDPS (Fig. 20) will indicate for you the adjusted no decompression bottom times that are available to you on your next dive, based on any residual nitrogen following your last dive and surface interval. WARNING: The PDPS predicts only no decompression times for subsequent dives. Depending on cylinder size and air consumption, you may have less time available than shown in the PDPS because of air or other limitations. As you will recall from page 5, after activation and diagnostics, the unit will enter the Surface Mode for 10 seconds then automatically commence the PDPS, identified by the PDPS icon (Fig. 20a). At that time and once each minute a FT DATA 100 GLO Fig. 20 - PDPS (Repetitive Dive) 21 FT afterward, the PDPS will automatically replace the Surface mode and sequentially show depths from 30 to 160 feet (9 to 48 m) in 10 foot (3 m) increments, which takes about 42 seconds. With each depth display you will see 'predicted' no decompression limits based upon your previous dive profiles. The Data100 will then return to the Surface mode for approximately 18 seconds before repeating the PDPS, continuing between the two modes for the first 12 hours after surfacing. The no decompression limits for a "clean" dive (no dives in the previous 24 hours) are those listed in Figure 21. Information displayed (Fig. 20, page 21 and above Fig. 21) includes Maximum Depth, No Decompression Limit (Dive Time) available at that depth, and the PDPS mode icon. No Decompression times are only displayed for depths where there are at least 3 minutes dive time available at the depth, taking into account a descent rate of 120 feet (36 meters) per minute. No Decompression Dive Mode WARNING: The Data100 must be manually activated and be in the Surface Mode or PDPS Mode prior to start of a dive. The unit will not activate automatically by immersion in water. Upon descending deeper than 5 feet (1.5 meters), the Data100 will enter the No Decompression Dive Mode, identified by the No Decompression Dive icon located to the left of the Main Time display. DATA 100 GLO Depth feet (meters) 30 (9) 40 (12) 50 (15) 60 (18) 70 (21) 80 (24) 90 (27) 100 (30) 110 (33) 120 (36) 130 (39) 140 (42) 150 (45) 160 (48) NDL-hr:min Eng (Metric) 4:20 (4:43) 2:17 (2:24) 1:20 (1:24) 0:57 (0:58) 0:40 (0:41) 0:30 (0:31) 0:24 (0:26) 0:19 (0:20) 0:16 (0:16) 0:13 (0:13) 0:10 (0:11) 0:09 (0:09) 0:08 (0:08) 0:07 (0:07) Fig. 21 - No Decompression Limits 22 DATA100 Information provided includes Current Depth, Elapsed Dive Time (and Elapsed Dive Time icon), No Decompression Dive Time Remaining for that depth, and Maximum Depth for that dive (and Max Depth icon). The Graphic Diver Interface is also active, displaying nitrogen loading (TLBG) and ascent rate (VARI). No Decompression Dive Time Remaining is the maximum amount of time you can stay at your current depth before entering a decompression situation. The No Decompression Time is calculated based on the amount of nitrogen absorbed by 12 hypothetical tissue compartments. The rates each of these compartments absorb and release nitrogen is mathematically modeled and compared against a maximum allowable nitrogen level. Whichever one of the 12 is closest to this maximum level will be considered the controlling compartment for that depth. Its resulting value is displayed numerically (Fig. 22a) along with the No Decompression Dive icon (Fig. 22b), and graphically in the TLBG (Fig. 22c). As you ascend from depth following a dive that has approached the no decompression limit, the TLBG will diminish as control shifts to slower compartments. This is a feature of the decompression model that is the basis for multilevel diving, one of the most important advantages the Data100 offers. See page 62 in the Reference section for more information pertaining to tissue tracking. b c a FT DATA 100 GLO Fig. 22 - No Decompression Dive Mode 23 The no decompression algorithm is based upon Haldane's theory using maximum allowable nitrogen levels developed by Merrill Spencer. Repetitive diving control is based upon experiments designed and conducted by Dr. Ray Rogers and Dr. Michael Powell in 1987. Diving Science and Technology® (DSAT), a corporate affiliate of PADI®, commissioned these experiments and now uses the findings in the Recreational Dive PlannerTM distributed by PADI. 12 o'clock No Deco Deco As your depth and bottom time increase, the TLBG will fill with segments in a clockwise direction from the lower left toward the upper center to represent the absorption of nitrogen. If the TLBG passes the 12 o'clock position (Fig. 23), you enter Decompression Mode. Upon ascent to shallower depths, the bar graph will begin to recede in a counter clockwise direction, indicating that additional no decompression time is available through multilevel diving. Decompression Dive Mode The Data100 will help you to avoid and manage decompression. DATA 100 GLO FT Fig. 23 - Entering into Decompression Mode WARNING: Oceanic recommends the application of responsible diving practices and does not recommend decompression diving, or diving deeper than 130 feet (39 meters), as these practices will greatly increase your risk of decompression sickness. 24 DATA100 Decompression Dive Mode, identified by the Decompression Dive icon located to the left of the Main Time Display (Fig. 24a), activates when the theoretical no decompression dive time/depth limits are exceeded causing the TLBG to pass the 12 o'clock position and enter the red decompression zone (Fig. 24b). Information provided includes current depth, current required decompression ceiling stop depth and time (and Ceiling Stop icon - Fig. 24c), and total ascent time that includes stop time at all ceilings and vertical ascent time calculated at 60 feet (18 meters) per minute. Once every 15 seconds while in the Decompression Dive Mode, an alternate display (Fig. 25) will appear on screen for 3 seconds. Information provided includes current depth, total ascent time, maximum depth for that dive (and Max Depth icon), and elapsed dive time (and Elapsed Dive Time icon). The Graphic Diver Interface will continue to display the VARI bar graph and the TLBG, that now acts as a Decompression "ceiling" indicator showing the ceiling stop depth that you must stay below. Upon entering decompression, you must immediately change the focus of your dive to getting back to the surface. Upon seeing the TLBG enter the red 10FT/ 3M ceiling stop zone, you should immediately begin a safe ascent, 60 feet (18 meters) per minute or slower, to a depth slightly deeper than or equal to the stop ceiling indicated. a b FT DATA 100 GLO c Fig. 24 - Decompression Dive Mode FT DATA 100 GLO Fig. 25 - Decompression (Alternate Screen) 25 You must stay at, or slightly below, the ceiling stop depth indicated until the TLBG recedes into the next shallower zone before ascending any further, or you will increase your risk of decompression sickness. The amount of decompression credit time you receive is dependent on depth, with slightly less credit given the deeper you are. Still, you must never ascend shallower than your decompression ceiling. Doing so will greatly increase your risk of decompression sickness and place the Data100 into a Conditional Violation Mode described later. When coping with surge and swell, it may be difficult to stay at an exact depth. You should stay slightly deeper (Fig. 26a) than the required stop depth indicated (Fig. 26b) until the TLBG recedes into the next shallower zone. Then, you can ascend to, but not shallower than, that indicated ceiling. Once you have performed the required decompression, the Data100 will switch to No Decompression Dive Mode, allowing additional time underwater. Though more time may be available, you must spend a portion of this time continuing to decompress at a safety stop deeper than or equal to 10 feet (3 meters). This will let the TLBG recede further into the yellow Caution zone or green No Decompression zone. During a dive in which you inadvertently enter decompression, you must focus on reducing your tissue loading as much as possible - by spending as much time as you can at your final safety stop. a b FT b DATA 100 GLO Fig. 26 - Decompression Stop Depth 26 DATA100 Violation Modes The Data100 enters one of three different Violation Modes when you exceed its ability to predict an ascent procedure. These modes are explained fully in the Handling the Extremes section beginning on page 33. Gauge Mode If the Data100 enters a Permanent Violation Mode, it will operate in Gauge Mode on subsequent dives, only displaying depth and time. The Data100 removes calculated displays that no longer provide correct information because of the violation. For the Data100 to reset itself, no dives must be made for 24 hours. See page 43 for a more detailed explanation of Gauge Mode. ASCENDING TO THE SURFACE While ascending to shallower depths , the segments that have filled up the TLBG (Fig. 27a) will begin to recede in a counter clockwise direction, offering a graphic representation of your multilevel diving capability. If you entered the Decompression Mode, you must not complete your ascent until the TLBG is at least inside the yellow Caution zone. If you have not entered the Decompression Mode, a safety stop made between 15-20 feet is strongly recommended as a standard procedure before completing your ascent. Providing that your air supply is sufficient, you should make every effort to a FT DATA 100 GLO Fig. 27 - TLBG 27 FT complete all of your ascents with the TLBG inside the green zone. While you cannot provide a guarantee against the occurrence of decompression sickness, you may choose your own personal zone of caution based upon your individual age, physique, excessive weight, training, experience, etc. to reduce the statistical risk. The Ascent Rate Indicator (Fig. 28) shows how fast you are ascending. When you exceed the maximum prescribed ascent rate of 60 feet per minute (18 meters per minute), the segments will enter the red zone and you will be alerted by a flashing bar graph. Rates as they correspond with the bar graph are: 0 segments = 0 to 20 fpm (0 to 6 mpm), 1 segment = 21 to 30 fpm (6.5 to 9 mpm), 2 segments = 31 to 40 fpm (9.5 to 12 mpm), 3 segments = 41 to 50 fpm (12.5 to 15 mpm), 4 segments = 51 to 60 fpm (15.5 to 18 mpm), and 5 flashing segments = 61+ fpm (18+ mpm). Dive Log Mode Dive Log Mode, identified by the Dive Log icon (Fig. 29a) located above the Surface Display icon, can be accessed while on the surface using the button on the front of the module. Information from your 12 latest dives is stored in the log for view. After 12 dives are accumulated, each subsequent dive will overwrite the oldest dive that exists in the log, i.e. the Data100 will add the most recent dive while deleting the oldest. Information is not lost when batteries are removed from the unit. DATA 100 GLO Fig. 28 - VARI (Too Fast) a DATA 100 GLO Fig. 29 - Dive Log Mode 28 DATA100 Dives are displayed in a sequence that starts with the dive most recently recorded scrolling back to the oldest of the 12 stored for viewing. Thus, your most recent dive will always be the first shown in the log sequence, the second most recent will appear next, etc. You can choose to either press and release, or press and hold, the button. Momentarily pressing and releasing the button initiates the Automatic Dive Log Sequence, that shows the log for each dive for approximately 4 seconds before scrolling to the previous dive's log. Pressing and holding the button in will freeze the information on the display giving you a chance to write it down in your logbook. To view the previous dive's log, momentarily release the button, then depress and hold it in again. Information provided for each dive's log includes (Fig. 30): · Dive Number - each time the unit is activated the first dive conducted during that 'activation period will be #1. Example: · Last Saturday you conducted 3 dives and the unit automatically shut off. · Today you conducted 2 dives. · Your log sequence would be #2, #1, #3, #2, #1. · This relates to #2 (today' most recent dive), #1 (today's first dive), #3 (Last Saturday's last dive), #2 (Last Saturday's second dive), #1(Last Saturday's first dive), etc. · Surface Interval - prior to that dive · Maximum Depth - reached during that dive (and Max Depth icon) DATA 100 GLO Fig. 30 - Dive Log 29 · Elapsed Dive Time (and Elapsed Dive Time icon) · VARI - maximum ascent rate at any time during that dive · TLBG - tissue loading at the time you surfaced from the dive. Time to Fly Mode As you should be aware from your own training, the longer you wait to fly after diving, the more you will reduce your exposure to decompression sickness. The Time to Fly counter begins counting down 10 minutes after the last dive has ended to assist you with deciding when enough surface time has elapsed to fly. It appears once per minute for several seconds before the Pre Dive Planning Sequence (Fig. 31) showing the word FLY above a countdown display that starts at 23:50 (hr : min). Twelve hours after the last dive, the Surface Mode and PDPS will be replaced with the Fly Mode (Fig. 32). The word FLY will be displayed continuously, with the final 12 hour countdown from 12:00 to 0:00. DATA 100 GLO DATA 100 GLO Fig. 31 - Fly Mode (First 12 Hours) Fig. 32 - Fly Mode (Second 12 Hours) WARNING: During the final 12 hours (the period between 12 and 24 hours after a dive), the Data100 is in a countdown mode only and must be reactivated prior to commencing a dive. 30 DATA100 After a surface interval of 12 hours, you may choose to fly, provided that your dive profile(s) did not enter decompression. If your diving involved decompression or a repetitive, multi day profile, it is strongly recommended that you wait a full 24 hours after your last dive to add a greater degree of protection. See page 50 for More About Flying After Diving, and DAN's guidelines. External Access Mode (EA) This special mode is not used by the diver. It is used only by the factory to retrieve diagnostic data from the Data100 through the small infrared ports located on the front of the display on each side of the button. Information is provided here to acquaint you with the mode and its possible effects. External Access Mode, signified by EA (Fig. 33), may be entered when the control button is depressed and held in for more than 8 seconds while in the Surface Mode or during the PDPS. The letters EA appear in the lower left of the LCD and a count down beginning at '6' in the lower right. After counting down to '0', the Data100 will revert back to the Surface Mode. WARNING: Entering the External Access Mode when a Low Battery condition is initially indicated will cause the flashing Low Battery icon to disappear implying that battery voltage is satisfactory. DO NOT dive until batteries are replaced. DATA 100 GLO Fig. 33 - External Access (EA) Mode 31 BACKLIGHT FEATURE In addition to using a high contrast LCD for easy readability in low light conditions, the Data100's OceangloTM backlight feature evenly and easily illuminates the full display (Fig. 34). This means that on night dives, in caves, or any other low light situation you illuminate the display when you wish to view it, with the touch of a button. To activate the OceangloTM backlight during the Dive mode, simply press and hold the control button. Oceanglo will remain illuminated as long as the button is depressed, plus 10 seconds after being released. Oceanic recommends that you always carry primary and backup dive lights when conducting dives that could include low light situations. FT DATA 100 GLO Fig. 34 - OceangloTM Backlight 32 HANDLING THE EXTREMES EMERGENCY DECOMPRESSION There are few legitimate excuses for making unplanned Decompression dives, and the consequences of this type of diving can be severe. Decompression diving requires special training. The Data100 is intended for use by recreational divers not engaged in intentional decompression diving. Decompression features are provided only for emergency situations. By entering decompression, you automatically impose a "ceiling" above you which you cannot immediately ascend beyond, denying you free access to the surface. DECOMPRESSION RULES ARE NOT MEANT TO BE BENT Professional military and commercial divers plan ahead for this situation by ensuring that they have complete surface support, including a redundant air supply for emergencies. They also navigate very carefully throughout their dive to ensure that they begin and complete their ascent while maintaining contact with a rope or a line to the surface. This is necessary for making a well controlled ascent. The Data100 is not intended for use by military or commercial divers. By making an unplanned Decompression dive without the necessary preparation and training, you will have placed yourself in an unnecessarily dangerous situation. You may also find yourself drifting long distances in an ocean current before you can surface, due to the lack of an ascent line. Your buddy may be unable to provide assistance without also risking decompression sickness. It is easy to see how this one mistake can quickly be compounded by several others. O N S IB L E 34 DI VER RESP The Data100 is a sophisticated instrument designed with capabilities that go beyond the range of recreational diving with compressed air. It should not be considered, however, that these built-in capabilities provide any implied approval or consent from Oceanic for individuals to exceed the defined limits of recreational dive profiles, as agreed on by all internationally recognized training agencies. Decompression diving should therefore be strictly avoided. The Data100 is designed to help you by providing a complete representation of how close you are to entering decompression. In the event that you do inadvertently enter decompression, the red zone of the TLBG (Fig. 35), the Data100 can provide you with limited information to help you ascend to the surface, if you follow the instructions given in this section. Oceanic strongly recommends that you avoid entering decompression, and reminds you that decompression diving requires special training. The Data100 cannot provide you with a backup air supply for emergencies or the ascent line you will need, and decompression diving greatly increases your risk of decompression sickness. DATA 100 DATA100 Red Deco Zone GLO Fig. 35 - TLBG Decompression Zone 35 WARNING: Existing data for making planned decompression dives is extremely limited, and virtually nonexistent for repetitive decompression diving. You must therefore avoid decompression diving and allow a surface interval of at least 24 hours before reentering the water in the event a dive requiring decompression is made. Yellow Caution Zone If you're not careful, it is possible to enter decompression rapidly, whether at deep depths or during repetitive dives. After entering decompression (especially at deeper depths) the TLBG may fill the decompression stop zones rapidly. Once you've entered decompression, it is imperative that you immediately change the focus of your activities and begin a safe ascent toward the required decompression stop ceiling. If you continue the dive at a depth greater than the ceiling, your exposure to decompression sickness will increase, and you will risk entering violation mode and losing the information needed to ascend properly. DATA 100 GLO CAUTION ZONE (TLBG) Your dive training taught you not to get too close to the No Decompression limits. The yellow Caution zone (C.Z.) of the TLBG, and its position on the LCD peripheral (Fig. 36), offers you a convenient way to consistently monitor how Fig. 36 - TLBG Caution Zone 36 close you are coming to the No Decompression limit, located at the 12 o'clock position. Oceanic suggests always leaving the water with the TLBG in the green No Decompression zone. WARNING: Never exit the water with the TLBG in the red Decompression zone. Doing so greatly increases the risk of decompression sickness, and may result in injury or death. Body metabolism varies from person to person, and even from day to day. If you are feeling less than 100%, or you are in less than perfect physical shape, use the Caution zone as a visual reference to place a wider margin of protection between you and the No Decompression limit. EXCEEDING MAXIMUM OPERATING DEPTH Although the Data100 will withstand the pressures found at 330 feet (99.5 meters), the depth that you can still use all its features could be much shallower. WARNING: The maximum recommended sport diving depth limit is 130 feet (39 meters). Any deeper dive should be avoided. Special training, equipment and support are necessary for this type of diving. Oceanic does not advocate diving to depths below 130 feet (39 meters), or decompression diving, the basis for which is theoritical. DATA100 37 FT The maximum depth that the Data100 will display all of its features, is 330 feet (99.5 meters). Upon exceeding 330 feet (99.5 meters), the TLBG will flash and Depth and Max Depth displays will only indicate and flash three dashes " " signifying that you are 'Out of Range' (Fig. 37). The numeric depth display will not reappear until you ascend shallower than 330 feet (99.5 meters). You will also enter the Delayed Violation Mode, described on page 40. For the remainder of that dive, and in the log for that dive, three dashes will be displayed as the value for Max Depth. After a dive, the Data100 will continue to calculate residual nitrogen for up to 24 hours. For a clean dive with no residual nitrogen remaining from previous dives, the Data100 will allow a maximum of 7 minutes no decompression dive time available at 160 feet (48 meters). Depending on your descent rate, 7 minutes at 160 feet (48 meters) can be a very short amount of time. It is much more practical to stay within the 11 minutes of no decompression time allowed at 130 feet (39 meters). If you exceed 130 feet (39 meters), watch the Data100 closely because you will enter decompression rapidly. Upon entering decompression the TLBG will pass the 12 o'clock position and enter the red zone and the decompression stop ceiling icons will be displayed (Fig. 38). DATA 100 GLO Fig. 37 - Out of Range (>330 ft or 99.5 m) Ceiling icons Red zone FT DATA 100 GLO Fig. 38 - Recognizing Decompression Mode 38 VIOLATION MODES WARNING: If you exceed certain limits, the Data100 will not be able to tell you how to get safely back to the surface. These situations will make the Data100 enter 'violation modes' and must be avoided at all costs. They push decompression theory to the limits and can result in loss of some Data100 functions for 24 hours after the dive in which a violation occurred. The Violation Modes that the Data100 can enter, depending on the situation, are termed "Conditional", "Delayed", and "Immediate". It is important to understand each different Violation Mode that the Data100 can enter and how to carry out decompression procedures in the event you enter one. DATA100 b a FT Conditional Violation Mode The Data100 will enter the Conditional Violation Mode (Fig.39) if you ascend shallower (Fig. 39a) than the required decompression ceiling indicated by the TLBG (Fig. 39b) and Required Stop Ceiling display (Fig. 39c). A momentary rise above the ceiling, such as with a surge or swell, will cause this to happen. Therefore you should stay slightly deeper than the exact ceiling depth, watching the Data100 closely when managing decompression. The Data100 will alert you to the Conditional Violation by flashing the Total DATA 100 GLO c Fig. 39 - Conditional Violation 39 Ascent Time display until you descend below the required decompression stop ceiling. If you descend below the required decompression ceiling before 5 minutes have elapsed, the Data100 will continue to function as if no violation had occurred, and you will not be penalized for your breach of the ceiling. For the first 5 minutes in the Conditional Violation Mode, no off-gassing credit will be given, and for each minute above the ceiling, 11/2 minutes of penalty time is added to decompression stop time. The added penalty decompression time will have to be "worked off" first before obtaining off-gassing credit. Once the penalty time is worked-off, and offgassing credit begins, the TLBG will recede towards the Caution zone. Upon entry into the Caution zone the Data100 will revert to the No Decompression Mode. If you exceed 5 minutes, the TLBG segments that have filled will flash and the Delayed Violation Mode will be entered. Delayed Violation Mode Three conditions will cause the Data100 to enter the Delayed Violation Mode: 1. You remain Above the Required Decompression Ceiling for more than 5 minutes. As previously described, you would then need to follow the 40