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SUUNTO DX User Manual

Page 132

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Oxygen tolerance unit

Used to measure the whole-body-toxicity.

Oxygen limit fraction

A term used by Suunto for the values displayed in the oxygen toxicity bar

graph. The value is either the CNS% or the OTU%.

O

2

%

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

has 21% oxygen.

Oxygen partial pressure

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.

PFO

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 in-

teratrial septum.

PO

2

Abbreviation for oxygen partial pressure.

RGBM

Abbreviation for Reduced Gradient Bubble Model.

Reduced Gradient Bubble Model

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

Repetitive dive

Any dive whose decompression time limits are affected by residual nitro-

gen absorbed during previous dives.

Residual nitrogen

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

dives.

SCR

SCR Semi-closed Circuit Rebreather; scuba that recycles a portion of

exhaled gas.

Scuba

Any self-contained underwater life support system.

SURF TIME

Abbreviation for surface interval time.

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