No decompression dive

NO DEC TIME

OEA = EAN = EANx

OLF

OTU

Oxygen tolerance unit

Oxygen limit fraction

O2%

Oxygen partial pressure

PFO

PO2

RGBM

Reduced Gradient Bubble Model Repetitive dive

Residual nitrogen

SURF TIME

Surface interval time

Technical dive

Tissue group

Trimix

UHMS

Whole-body toxicity

Any dive which permits a direct, uninterrupted ascent to the surface at any time.

Abbreviation for no decompression time limit.

Abbreviations for oxygen enriched air nitrox.

Abbreviation for oxygen limit fraction.

Abbreviation for oxygen tolerance unit.

Used to measure the whole-body-toxicity.

A term used by Suunto for the values displayed in the oxygen toxicity bar graph. The value is either the CNS% or the OTU%.

Oxygen percentage or oxygen fraction in the breathing gas. Standard air has 21% oxygen.

Limits the maximum depth to which the nitrox mixture can be safely used. The maximum partial pressure limit for enriched air diving is 1.4 bar. The contingency partial pressure limit is 1.6 bar. Dives beyond this limit risk immediate oxygen toxicity.

Abbreviation for patent foramen ovale. It is a form of congenital heart defect that enables blood flow between the left and right atria via the interatrial septum.

Abbreviation for oxygen partial pressure.

Abbreviation for Reduced Gradient Bubble Model.

Modern algorithm for tracking both dissolved and free gas in divers.

Any dive whose decompression time limits are affected by residual nitrogen absorbed during previous dives.

The amount of excess nitrogen remaining in a diver after one or more dives.

Abbreviation for surface interval time.

Elapsed time between surfacing from a dive and beginning a descent for the subsequent repetitive dive.

A dive made with two or more breathing gas mixes.

Theoretical concept used to model bodily tissues for the construction of decom- pression tables or calculations.

A breathing gas mix of helium, oxygen and nitrogen.

Abbreviation for Undersea and Hyperbaric Medical Society.

Another form of oxygen toxicity, which is caused by prolonged exposure to high oxygen partial pressures. The most common symptoms are irritation in the lungs, a burning sensation in the chest, coughing and reduction of the vital capacity. Also called Pulmonary Oxygen Toxicity. See also OTU.

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Suunto HELO2 manual No DEC Time