Diving in nitrox mode 3.4.1. before diving, Warning – SUUNTO Gekko User Manual
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3.4. DIVING IN NITROX MODE
3.4.1. Before Diving
The GEKKO can be set for diving with standard air only (Air mode) or it can be
set for diving with Enriched Air Nitrox (Nitrox mode). If you are educated for
nitrox diving and you plan to make nitrox dives, it is recommended that you set
the dive computer permanently to its NITR OX Mode. The Nitrox mode can be
enabled by accessing MODE-SET-MODEL (see chapter 4.2. “Set Modes”).
If set to Nitrox mode, the correct oxygen percentage of the gas in your c ylinder
must always be entered into the computer to ensure correct nitrogen and oxygen
calculations. The dive computer adjusts its mathematical nitrogen and oxygen
calculation models according to the entered O2% and PO2 v alues. Calculations
based on Nitrox use result in longer no-decompression times and shallo wer
maximum depths than diving with air. When the dive computer is set in Nitrox
mode the Dive Planning modes calculates with the O2% and PO2 values that are
currently in the computer.
WARNING!
DO NOT DIVE WITH A CYLINDER OF ENRICHED AIR IF YOU HAVE
NOT PERSONALLY VERIFIED ITS CONTENTS AND ENTERED THE
ANALYSIS VALUE INTO YOUR DIVE COMPUTER!
Failure to verify cylinder contents and enter the appropriate O
2
% into your dive
computer will result in incorrect dive planning information.
Fig. 3.19. Ceiling and Floor
Zones. The Recommended
and Manadatory Safety Stop
zone lies between 6m and
3m [20 ft and 10ft].
WARNING!
The dive computer will not accept fractional percentage v alues of oxygen
concentration. Do not round up fractional percentages. For example, 31.8%
oxygen should be entered as 31%. Rounding up will cause nitrogen percent-
ages to be understated and will af fect decompression calculations. If there
is a desire to adjust the computer to provide more conservative calculations,
use the personal adjustment feature to affect decompression calculations or
reduce the PO
2
setting to af fect oxygen e xposure according to the entered
O
2
% and PO
2
values.
3m / 10ft
6m / 18ft
CEILING
FLOOR