NAUI Instructor
Henry's Law - answer The amount of gas dissolved in a liquid is directly related to its
partial pressure above the liquid.
Relationship of gas solubility and temperature - answer Solubility of gas decreases
with increasing temperature
(INVERSELY RELATED)
Inert gas loading in relation to body tissue - answer Body tissue absorbs more inert
gas as depth increases
Benefit of Dive Computer compared to Dive Tables - answer Gives the diver credit
for shallow portions of the dive
Cold or Strenuous dive planning rule - answer Use the next greater dive TIME to
determine letter group
Equilibrium as it relates to nitrogen in the body - answer When the pressure of
nitrogen is balanced between air and your body
Haldane surfacing ratio - answer Originally 2:1 - Updated with new research to
1.58:1
Tissue compartment half-time - answer The time required for the compartment to
absorb or eliminate half of the pressure difference between what it started with and the
ambient pressure
M-Value of tissue - answer The maximum allowable nitrogen (inert gas) pressure in
a specific tissue
NAUI recommendation for diving while pregnant - answer Do not dive while pregnant
Haldane tissue compartments - answer Haldane - 5 compartments
Modern Computers - Apx. 16 compartments
Tissue compartment - answer Mathematical model consisting of multiple theoretical
tissues and their relative halftimes
Fast compartments - short halftimes
Slow compartments - long halftimes
, Ascent rate at altitude - answer Slower than at sea level
Extend dive times with gas by - answer Decreased nitrogen and increased oxygen in
breathing gas
RNT - answer Residual Nitrogen Time
Tme already spent at the repetitive dive depth (dive tables)
Procedure for missed decompression stops - answer Remain out of the water, rest,
breathe 100% oxygen, drink fluids, be monitored for signs of decompression illness,
transported to a hyperbaric facility if symptoms arise
SIT - answer Surface Interval Time
Longer time at the surface allows for increased repeat dive times
Canadian Dive Tables published by the Defense and Civil Institute of Environmental
Medicine (DCIEM) - answer Based on 20+ years of research pioneered by Kidd and
Stubbs (1962)
Swiss Dive Tables - answer Developed by A.A. Bühlmann at the University of Zurich
- EXTENDED TO INCLUDE ALTITUDE DIVING
If the time spent making a "precautionary stop" at 5 msw (15 fsw) causes your Total
Dive Time to exceed the Dive Time Limits, you should: - answer Use the Maximum
Dive Time as your Total Dive Time
Aching pains an hour after a dive might be: - answer Decompression sickness
ATA rating for most hyperbaric chambers for treating divers: - answer 6 ATA
Haldane Tissue Half-Times (Compartments) - answer 5, 10, 20, 40, 75 Mins
High altitude dive - answer Any dive at greater than 1000 feet
Ideal hyperbaric chamber for dive injury - answer Multiplace, double-lock chamber
rated for service to six atmospheres
Repetitive Dive - answer Any dive started within 24 hours after a previous dive
NAUI recommended minimum SIT time - answer 60 mins
Dives shallower than 40 ft are considered how deep on NAUI Dive Tables - answer
40 ft
How long after diving should you wait to fly - answer 24 hrs
Henry's Law - answer The amount of gas dissolved in a liquid is directly related to its
partial pressure above the liquid.
Relationship of gas solubility and temperature - answer Solubility of gas decreases
with increasing temperature
(INVERSELY RELATED)
Inert gas loading in relation to body tissue - answer Body tissue absorbs more inert
gas as depth increases
Benefit of Dive Computer compared to Dive Tables - answer Gives the diver credit
for shallow portions of the dive
Cold or Strenuous dive planning rule - answer Use the next greater dive TIME to
determine letter group
Equilibrium as it relates to nitrogen in the body - answer When the pressure of
nitrogen is balanced between air and your body
Haldane surfacing ratio - answer Originally 2:1 - Updated with new research to
1.58:1
Tissue compartment half-time - answer The time required for the compartment to
absorb or eliminate half of the pressure difference between what it started with and the
ambient pressure
M-Value of tissue - answer The maximum allowable nitrogen (inert gas) pressure in
a specific tissue
NAUI recommendation for diving while pregnant - answer Do not dive while pregnant
Haldane tissue compartments - answer Haldane - 5 compartments
Modern Computers - Apx. 16 compartments
Tissue compartment - answer Mathematical model consisting of multiple theoretical
tissues and their relative halftimes
Fast compartments - short halftimes
Slow compartments - long halftimes
, Ascent rate at altitude - answer Slower than at sea level
Extend dive times with gas by - answer Decreased nitrogen and increased oxygen in
breathing gas
RNT - answer Residual Nitrogen Time
Tme already spent at the repetitive dive depth (dive tables)
Procedure for missed decompression stops - answer Remain out of the water, rest,
breathe 100% oxygen, drink fluids, be monitored for signs of decompression illness,
transported to a hyperbaric facility if symptoms arise
SIT - answer Surface Interval Time
Longer time at the surface allows for increased repeat dive times
Canadian Dive Tables published by the Defense and Civil Institute of Environmental
Medicine (DCIEM) - answer Based on 20+ years of research pioneered by Kidd and
Stubbs (1962)
Swiss Dive Tables - answer Developed by A.A. Bühlmann at the University of Zurich
- EXTENDED TO INCLUDE ALTITUDE DIVING
If the time spent making a "precautionary stop" at 5 msw (15 fsw) causes your Total
Dive Time to exceed the Dive Time Limits, you should: - answer Use the Maximum
Dive Time as your Total Dive Time
Aching pains an hour after a dive might be: - answer Decompression sickness
ATA rating for most hyperbaric chambers for treating divers: - answer 6 ATA
Haldane Tissue Half-Times (Compartments) - answer 5, 10, 20, 40, 75 Mins
High altitude dive - answer Any dive at greater than 1000 feet
Ideal hyperbaric chamber for dive injury - answer Multiplace, double-lock chamber
rated for service to six atmospheres
Repetitive Dive - answer Any dive started within 24 hours after a previous dive
NAUI recommended minimum SIT time - answer 60 mins
Dives shallower than 40 ft are considered how deep on NAUI Dive Tables - answer
40 ft
How long after diving should you wait to fly - answer 24 hrs
