Archive for the ‘Terminology’ Category

“P” Factors in Diving

Terminologies for “P”

Pacemaker
Electronis device that sends signals to the heart causing a rhythm change.

PADI
Professional Association of Diving Instructors.

Partial Pressure
Pressure exerted by a single component of a gas within a gas mixture or dissolved in a liquid.

Partial Pressure, Carbon Dioxide (PCO2)
Pressure exerted by carbon dioxide in any mixture of gases or dissolved in a liquid.

Partial Pressure, Nitrogen (PN2)
Pressure exerted by nitrogen component in any Read the rest of this entry »

Terminologies for “O”

“O” Factors in Diving:

OEA
Oxygen enriched air; nitrox.

Octopus
An extra second stage regulator used by your diving buddy in an out of air emergency.

Oil-filled Depth Gauge
These are the most widely used depth measuring devices. They are Read the rest of this entry »

Terminologies for “N”

“N” Factors in Diving:

Narced
Nitrogen narcosis; being under the influence of nitrogen while diving.

Narcosis
Depressed mental state, anywhere from confusion or drowsiness to coma.

Nasal Congestion
Swollen, blood-filled linings of the nose and sinuses, often due to Read the rest of this entry »

“M” Factors in Diving – Terminology

“M” Factors

M-Value
An M-value is used in conjunction with a dive computer to express the tissue compartment’s maximum allowable pressure in feet of seawater absolute (fswa).

Macro Photography
This is a method of getting close-up pictures of a subject by using special close-up accessories attached to the camera’s lens.

Mal de mer
Motion sickness or sea sickness.

Marfan’s Syndrome
Familial condition produced by an Read the rest of this entry »

“J” Factors in Diving (Terminology)

“J” Factors:

J-Valve
A J-Valve contains a spring-loaded that, if activated, will shut off a diver’s air supply when the diver reaches a certain tank pressure – usually 300 psi / 20 bar.

 

 

The “I” Factors in Diving (Terminology)

IANTD
International Association of Nitrox & Technical Divers.

Immersion Hypothermia
Lowering of body temperature by full body immersion in cold water. See hypothermia.

Infection, HIV
Infection with the Human Immune Virus. Not necessarily a contra-indication of diving.

Infection, Marine Wound
Infection with marine organisms that are Read the rest of this entry »

“I” Terminologies in Diving

“I” Factors

IANTD
International Association of Nitrox & Technical Divers.

Immersion Hypothermia
Lowering of body temperature by full body immersion in cold water. See hypothermia.

Infection, HIV
Infection with the Human Immune Virus. Not Read the rest of this entry »

The “H” Factors in Diving (Terminology)

The “H” Factors in Diving

Half Time
Half the time it takes for a dissoved gas in a tissue (such as nitrogen) to equilibrate to a new pressure, or to reach full saturation at a new pressure. Theoretical tissue half times are used in designing dive tables and algorithms for dive computers.

Haldanian
Related to Haldane’s theory that nitrogen is taken up and given off in exponential fashion during a dive, and that there is Read the rest of this entry »

The “G” Factors in Diving (Terminology)

“G” Factors in Diving

Gag Reflex, Overactive
The inability to retain an object in the mouth without gagging or retching.

Gas Absorption and Elimination
Dissolved gases such as nitrogen are absorbed into the blood and tissues during the course of a dive. The level of saturation depends on the depth of the dive. The elimination of Read the rest of this entry »

“F” Factors in Diving (Terminology)

The “F” Factors in Diving

First Stage
The part of the regulator which attaches to the scuba tank valve that lowers the tank pressure to ambient pressure + a pre-determined pressure (e.g., ambient + 140 psi). The term can also refer to the Read the rest of this entry »