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Maximum Depth - The deepest depth attained during a dive.
Mode - A specific set of functions in a dive computer.
Multi-level Dive - A type of dive profile where the diver spends various times at different shallower depths (opposite of a “Square Wave” dive profile).
NDL - Abbreviation for No Decompression Limit.
Nitrogen Bar Graph - A graphic display of simulated nitrogen absorption.
Nitrox - A nitrogen-oxygen breathing gas mixture that contains a higher fraction of oxygen than air.
Nitrox Dive - A dive conducted using nitrox (22 to 50 % O2) as the breathing gas.
No Decompression - Any part of a dive where the diver can surface without requiring a decompression stop.
No Decompression Limit - The amount of dive time remaining based on no decompression status.
O2SAT - Abbreviation for oxygen saturation.
OTL - Abbreviation for oxygen tolerance limit.
Out of Range - The point at which a dive computer can no longer supply correct dive information.
Oxygen Tolerance Limit - The amount of dive time remaining based on exposure to elevated levels of oxygen.
Oxygen Toxicity - The adverse physiological affects of exposure to elevated levels of oxygen.
Partial Pressure - The proportion of the total pressure contributed by a single gas in a mixture of gases.
Plan Mode - An accessible sequential display of available dive times at 10 FT (3 M) intervals from 30 to 190 FT (9 to 57 M) used when dive planning.
PO2 - Partial pressure of oxygen. The proportion of total pressure of a gas mixture contributed by oxygen.
Repetitive Dive - Any dive that takes place within 12 hours of a previous dive.
Safety Stop - A depth at which a diver may choose, but is not required, to pause during ascent to allow absorbed nitrogen to escape naturally from
the tissues.
Square Wave Dive - A type of dive profile where the entire dive is spent at one depth between descent and ascent.
Symbol - a small pictorial representation of an operational mode or informational display.
Tissue - See Compartment.
Tissue Compartment - See Compartment.
Transducer - An electro-mechanical device in a dive computer that acts as a depth or pressure sensor.
Transition Period - The first 10 minutes of surface time after ascending to 2 FT (0.6 M).
GLOSSARY (continued)
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