User manual SUUNTO D4 QUICK GUIDE

[. . . ] WARNINGS, CAUTIONS, AND NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SUUNTO D4 AT A GLANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Navigating in the menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Button symbols and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] However, it is recommended that you activate the DIVE Mode manually before entering the water in order to perform the necessary dive pre-checks. 6. 1. 1. Basic dive data During a No-decompression dive, the following information is displayed: 50 · your present depth in meters/feet · the available no-decompression time in minutes as NO DEC TIME · the ascent rate presented as a bar graph on the right side Alternative displays, by pressing the UP/DOWN buttons, show: · the elapsed dive time in minutes, shown as DIVE TIME · the water temperature in °C/°F · the maximum depth during this dive in meters/feet, indicated as MAX · the current time, shown as TIME DOWN BUTTON TOGGLES BETWEEN MAXIMUM DEPTH AND CURRENT TIME. UP BUTTON TOGGLES BETWEEN DIVE TIME AND WATER TEMPERATURE. 51 6. 1. 2. Bookmark It is possible to record bookmarks in the profile memory during a dive. These bookmarks are displayed when scrolling the profile memory on the display. The bookmarks will also be shown as annotations in the downloadable Suunto Dive Manager PC software. To make a bookmark in the profile memory during a dive, press the SELECT button. A brief confirmation will be given. A BOOKMARK IS PLACED IN THE PROFILE MEMORY DURING A DIVE BY PRESSING THE SELECT BUTTON. 6. 1. 3. You should always make the Mandatory and Recommended Safety Stops after you have exceeded the maximum recommended ascent rate. If this Mandatory Safety Stop is not completed, the decompression model will penalize your next dive(s). Continuous ascent rate violations will result in Mandatory Safety Stops. When Recommended Deep Stop is enabled, the length is indicated in seconds. 52 6. 1. 4. Decompression dives When your NO DEC TIME becomes zero, your dive becomes a decompression dive so you must perform one or more decompression stops on your way to the surface. The NO DEC TIME on your display will be replaced by an ASC TIME, and a CEILING notation will appear. If you exceed the no-decompression limits on a dive, the dive computer will provide the decompression information required for ascent. After this, the instrument will continue to provide subsequent interval and repetitive dive information. Rather than requiring you to make stops at fixed depths, the dive computer lets you decompress within a range of depths (continuous decompression). The ascent time (ASC TIME) is the minimum amount of time needed to reach the surface in a decompression dive. It includes: · the time needed to ascend to the ceiling at an ascent rate of 10 m/33 ft per minute. The ceiling is the shallowest depth to which you should ascend · the time needed at the ceiling · the time needed at the Mandatory Safety Stop (if any) · the time needed to reach the surface after the ceiling and Safety Stops have been completed 53 WARNING YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN DISPLAYED BY THE INSTRUMENT!The ascent time will increase if you: · remain at depth · ascend slower than 10 m/33 ft per minute · make your decompression stop deeper than at the ceiling These factors will also increase the amount of air required to reach the surface. Ceiling, ceiling zone, floor and decompression range When in decompression, it is important that you understand the meaning of ceiling, floor, and decompression range. · The ceiling is the shallowest depth to which you should ascend when in decompression. At this depth, or below, you must perform all stops · The ceiling zone is the optimum decompression stop zone. [. . . ] The most important of which is an epileptic-like convulsion which can cause a diver to drown. Time spent at a decompression stop, or range, before surfacing, to allow absorbed nitrogen to escape naturally from tissues On a decompression stop dive, the depth range between the floor and the ceiling within which a diver must stop for some time during ascent. CNS CNS% Compartment DAN DCI Decompression Decompression range 102 Decompression illness Any of a variety of maladies resulting either directly or indirectly from the formation of nitrogen bubbles in tissues or body fluids, as a result of inadequately controlled decompression. A group of repetitive dives between which the dive computer indicates some nitrogen loading is present. Elapsed time between leaving the surface to descend, and returning to the surface at the end of a dive. [. . . ]