NAUI INSTRUCTOR QUESTIONS AND ANSWERS
Henry's Law - CORRECT 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 - CORRECT ANSWER✅✅Solubility of gas decreases with
increasing temperature
(INVERSELY RELATED)
Inert gas loading in relation to body tissue - CORRECT ANSWER✅✅Body tissue absorbs more inert gas
as depth increases
Benefit of Dive Computer compared to Dive Tables - CORRECT ANSWER✅✅Gives the diver credit for
shallow portions of the dive
Cold or Strenuous dive planning rule - CORRECT ANSWER✅✅Use the next greater dive TIME to
determine letter group
Equilibrium as it relates to nitrogen in the body - CORRECT ANSWER✅✅When the pressure of nitrogen
is balanced between air and your body
Haldane surfacing ratio - CORRECT ANSWER✅✅Originally 2:1 - Updated with new research to 1.58:1
Tissue compartment half-time - CORRECT 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 - CORRECT ANSWER✅✅The maximum allowable nitrogen (inert gas) pressure in a
specific tissue
NAUI recommendation for diving while pregnant - CORRECT ANSWER✅✅Do not dive while pregnant
,Haldane tissue compartments - CORRECT ANSWER✅✅Haldane - 5 compartments
Modern Computers - Apx. 16 compartments
Tissue compartment - CORRECT ANSWER✅✅Mathematical model consisting of multiple theoretical
tissues and their relative halftimes
Fast compartments - short halftimes
Slow compartments - long halftimes
Ascent rate at altitude - CORRECT ANSWER✅✅Slower than at sea level
Extend dive times with gas by - CORRECT ANSWER✅✅Decreased nitrogen and increased oxygen in
breathing gas
RNT - CORRECT ANSWER✅✅Residual Nitrogen Time
Tme already spent at the repetitive dive depth (dive tables)
Procedure for missed decompression stops - CORRECT 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 - CORRECT 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) -
CORRECT ANSWER✅✅Based on 20+ years of research pioneered by Kidd and Stubbs (1962)
Swiss Dive Tables - CORRECT 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: - CORRECT ANSWER✅✅Use the Maximum Dive Time as your Total
Dive Time
Aching pains an hour after a dive might be: - CORRECT ANSWER✅✅Decompression sickness
ATA rating for most hyperbaric chambers for treating divers: - CORRECT ANSWER✅✅6 ATA
Haldane Tissue Half-Times (Compartments) - CORRECT ANSWER✅✅5, 10, 20, 40, 75 Mins
High altitude dive - CORRECT ANSWER✅✅Any dive at greater than 1000 feet
Ideal hyperbaric chamber for dive injury - CORRECT ANSWER✅✅Multiplace, double-lock chamber rated
for service to six atmospheres
Repetitive Dive - CORRECT ANSWER✅✅Any dive started within 24 hours after a previous dive
NAUI recommended minimum SIT time - CORRECT ANSWER✅✅60 mins
Dives shallower than 40 ft are considered how deep on NAUI Dive Tables - CORRECT ANSWER✅✅40 ft
How long after diving should you wait to fly - CORRECT ANSWER✅✅24 hrs
Can NAUI Dive Tables be applied for decompression of an altitude dive? - CORRECT ANSWER✅✅No
Who created the RGBM Tables - CORRECT ANSWER✅✅Bruce R. Wienke
Repetitive Dives must be - CORRECT ANSWER✅✅Shallower than the previous dive
Henry's Law - CORRECT 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 - CORRECT ANSWER✅✅Solubility of gas decreases with
increasing temperature
(INVERSELY RELATED)
Inert gas loading in relation to body tissue - CORRECT ANSWER✅✅Body tissue absorbs more inert gas
as depth increases
Benefit of Dive Computer compared to Dive Tables - CORRECT ANSWER✅✅Gives the diver credit for
shallow portions of the dive
Cold or Strenuous dive planning rule - CORRECT ANSWER✅✅Use the next greater dive TIME to
determine letter group
Equilibrium as it relates to nitrogen in the body - CORRECT ANSWER✅✅When the pressure of nitrogen
is balanced between air and your body
Haldane surfacing ratio - CORRECT ANSWER✅✅Originally 2:1 - Updated with new research to 1.58:1
Tissue compartment half-time - CORRECT 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 - CORRECT ANSWER✅✅The maximum allowable nitrogen (inert gas) pressure in a
specific tissue
NAUI recommendation for diving while pregnant - CORRECT ANSWER✅✅Do not dive while pregnant
,Haldane tissue compartments - CORRECT ANSWER✅✅Haldane - 5 compartments
Modern Computers - Apx. 16 compartments
Tissue compartment - CORRECT ANSWER✅✅Mathematical model consisting of multiple theoretical
tissues and their relative halftimes
Fast compartments - short halftimes
Slow compartments - long halftimes
Ascent rate at altitude - CORRECT ANSWER✅✅Slower than at sea level
Extend dive times with gas by - CORRECT ANSWER✅✅Decreased nitrogen and increased oxygen in
breathing gas
RNT - CORRECT ANSWER✅✅Residual Nitrogen Time
Tme already spent at the repetitive dive depth (dive tables)
Procedure for missed decompression stops - CORRECT 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 - CORRECT 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) -
CORRECT ANSWER✅✅Based on 20+ years of research pioneered by Kidd and Stubbs (1962)
Swiss Dive Tables - CORRECT 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: - CORRECT ANSWER✅✅Use the Maximum Dive Time as your Total
Dive Time
Aching pains an hour after a dive might be: - CORRECT ANSWER✅✅Decompression sickness
ATA rating for most hyperbaric chambers for treating divers: - CORRECT ANSWER✅✅6 ATA
Haldane Tissue Half-Times (Compartments) - CORRECT ANSWER✅✅5, 10, 20, 40, 75 Mins
High altitude dive - CORRECT ANSWER✅✅Any dive at greater than 1000 feet
Ideal hyperbaric chamber for dive injury - CORRECT ANSWER✅✅Multiplace, double-lock chamber rated
for service to six atmospheres
Repetitive Dive - CORRECT ANSWER✅✅Any dive started within 24 hours after a previous dive
NAUI recommended minimum SIT time - CORRECT ANSWER✅✅60 mins
Dives shallower than 40 ft are considered how deep on NAUI Dive Tables - CORRECT ANSWER✅✅40 ft
How long after diving should you wait to fly - CORRECT ANSWER✅✅24 hrs
Can NAUI Dive Tables be applied for decompression of an altitude dive? - CORRECT ANSWER✅✅No
Who created the RGBM Tables - CORRECT ANSWER✅✅Bruce R. Wienke
Repetitive Dives must be - CORRECT ANSWER✅✅Shallower than the previous dive
