NAUI INSTRUCTOR REVISED QUESTIONS
WITH 100%CORRECTLY VERIFIED ANSWERS
[2026/2027]
Henry's Law - Correct Answers -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 Answers -Solubility of gas decreases
with increasing temperature
(INVERSELY RELATED)
Inert gas loading in relation to body tissue - Correct Answers -Body tissue absorbs more inert
gas as depth increases
Benefit of Dive Computer compared to Dive Tables - Correct Answers -Gives the diver credit for
shallow portions of the dive
Cold or Strenuous dive planning rule - Correct Answers -Use the next greater dive TIME to
determine letter group
Equilibrium as it relates to nitrogen in the body - Correct Answers -When the pressure of
nitrogen is balanced between air and your body
Haldane surfacing ratio - Correct Answers -Originally 2:1 - Updated with new research to 1.58:1
Tissue compartment half-time - Correct Answers -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 Answers -The maximum allowable nitrogen (inert gas) pressure in a
specific tissue
NAUI recommendation for diving while pregnant - Correct Answers -Do not dive while pregnant
Haldane tissue compartments - Correct Answers -Haldane - 5 compartments
Modern Computers - Apx. 16 compartments
Tissue compartment - Correct Answers -Mathematical model consisting of multiple theoretical
tissues and their relative halftimes
Fast compartments - short halftimes
Slow compartments - long halftimes
Ascent rate at altitude - Correct Answers -Slower than at sea level
Extend dive times with gas by - Correct Answers -Decreased nitrogen and increased oxygen in
breathing gas
RNT - Correct Answers -Residual Nitrogen Time
Tme already spent at the repetitive dive depth (dive tables)
Procedure for missed decompression stops - Correct Answers -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 Answers -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 Answers -Based on 20+ years of research pioneered by Kidd and Stubbs
(1962)
Swiss Dive Tables - Correct Answers -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 Answers -Use the Maximum Dive Time as
your Total Dive Time
Aching pains an hour after a dive might be: - Correct Answers -Decompression sickness
ATA rating for most hyperbaric chambers for treating divers: - Correct Answers -6 ATA
Haldane Tissue Half-Times (Compartments) - Correct Answers -5, 10, 20, 40, 75 Mins
High altitude dive - Correct Answers -Any dive at greater than 1000 feet
Ideal hyperbaric chamber for dive injury - Correct Answers -Multiplace, double-lock chamber
rated for service to six atmospheres
Repetitive Dive - Correct Answers -Any dive started within 24 hours after a previous dive
NAUI recommended minimum SIT time - Correct Answers -60 mins
WITH 100%CORRECTLY VERIFIED ANSWERS
[2026/2027]
Henry's Law - Correct Answers -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 Answers -Solubility of gas decreases
with increasing temperature
(INVERSELY RELATED)
Inert gas loading in relation to body tissue - Correct Answers -Body tissue absorbs more inert
gas as depth increases
Benefit of Dive Computer compared to Dive Tables - Correct Answers -Gives the diver credit for
shallow portions of the dive
Cold or Strenuous dive planning rule - Correct Answers -Use the next greater dive TIME to
determine letter group
Equilibrium as it relates to nitrogen in the body - Correct Answers -When the pressure of
nitrogen is balanced between air and your body
Haldane surfacing ratio - Correct Answers -Originally 2:1 - Updated with new research to 1.58:1
Tissue compartment half-time - Correct Answers -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 Answers -The maximum allowable nitrogen (inert gas) pressure in a
specific tissue
NAUI recommendation for diving while pregnant - Correct Answers -Do not dive while pregnant
Haldane tissue compartments - Correct Answers -Haldane - 5 compartments
Modern Computers - Apx. 16 compartments
Tissue compartment - Correct Answers -Mathematical model consisting of multiple theoretical
tissues and their relative halftimes
Fast compartments - short halftimes
Slow compartments - long halftimes
Ascent rate at altitude - Correct Answers -Slower than at sea level
Extend dive times with gas by - Correct Answers -Decreased nitrogen and increased oxygen in
breathing gas
RNT - Correct Answers -Residual Nitrogen Time
Tme already spent at the repetitive dive depth (dive tables)
Procedure for missed decompression stops - Correct Answers -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 Answers -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 Answers -Based on 20+ years of research pioneered by Kidd and Stubbs
(1962)
Swiss Dive Tables - Correct Answers -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 Answers -Use the Maximum Dive Time as
your Total Dive Time
Aching pains an hour after a dive might be: - Correct Answers -Decompression sickness
ATA rating for most hyperbaric chambers for treating divers: - Correct Answers -6 ATA
Haldane Tissue Half-Times (Compartments) - Correct Answers -5, 10, 20, 40, 75 Mins
High altitude dive - Correct Answers -Any dive at greater than 1000 feet
Ideal hyperbaric chamber for dive injury - Correct Answers -Multiplace, double-lock chamber
rated for service to six atmospheres
Repetitive Dive - Correct Answers -Any dive started within 24 hours after a previous dive
NAUI recommended minimum SIT time - Correct Answers -60 mins
