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NAUI Instructor EXAM QUESTIONS WITH
COMPLETE SOLUTION GUIDE (A+
GRADED 100% VERIFIED) LATEST
VERSION 2025!!
Henry's Law Ans: The amount of gas dissolved in a liquid is
directly related to its partial pressure above the liquid.
Relationship of gas solubility and temperature Ans: Solubility of
gas decreases with increasing temperature
(INVERSELY RELATED)
Inert gas loading in relation to body tissue Ans: Body tissue
absorbs more inert gas as depth increases
Benefit of Dive Computer compared to Dive Tables Ans: Gives
the diver credit for shallow portions of the dive
Cold or Strenuous dive planning rule Ans: Use the next greater
dive TIME to determine letter group
Equilibrium as it relates to nitrogen in the body Ans: When the
pressure of nitrogen is balanced between air and your body
Haldane surfacing ratio Ans: Originally 2:1 - Updated with new
research to 1.58:1
Tissue compartment half-time Ans: The time required for the
compartment to absorb or eliminate half of the pressure
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difference between what it started with and the ambient
pressure
M-Value of tissue Ans: The maximum allowable nitrogen (inert
gas) pressure in a specific tissue
NAUI recommendation for diving while pregnant Ans: Do not
dive while pregnant
Haldane tissue compartments Ans: Haldane - 5 compartments
Modern Computers - Apx. 16 compartments
Tissue compartment Ans: Mathematical model consisting of
multiple theoretical tissues and their relative halftimes
Fast compartments - short halftimes
Slow compartments - long halftimes
Ascent rate at altitude Ans: Slower than at sea level
Extend dive times with gas by Ans: Decreased nitrogen and
increased oxygen in breathing gas
RNT Ans: Residual Nitrogen Time
Tme already spent at the repetitive dive depth (dive tables)
Procedure for missed decompression stops Ans: 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
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SIT Ans: 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) Ans: Based on
20+ years of research pioneered by Kidd and Stubbs (1962)
Swiss Dive Tables Ans: 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: Ans: Use the Maximum Dive Time as your
Total Dive Time
Aching pains an hour after a dive might be: Ans:
Decompression sickness
ATA rating for most hyperbaric chambers for treating divers:
Ans: 6 ATA
Haldane Tissue Half-Times (Compartments) Ans: 5, 10, 20, 40,
75 Mins
High altitude dive Ans: Any dive at greater than 1000 feet
Ideal hyperbaric chamber for dive injury Ans: Multiplace,
double-lock chamber rated for service to six atmospheres
Repetitive Dive Ans: Any dive started within 24 hours after a
previous dive
NAUI Instructor EXAM QUESTIONS WITH
COMPLETE SOLUTION GUIDE (A+
GRADED 100% VERIFIED) LATEST
VERSION 2025!!
Henry's Law Ans: The amount of gas dissolved in a liquid is
directly related to its partial pressure above the liquid.
Relationship of gas solubility and temperature Ans: Solubility of
gas decreases with increasing temperature
(INVERSELY RELATED)
Inert gas loading in relation to body tissue Ans: Body tissue
absorbs more inert gas as depth increases
Benefit of Dive Computer compared to Dive Tables Ans: Gives
the diver credit for shallow portions of the dive
Cold or Strenuous dive planning rule Ans: Use the next greater
dive TIME to determine letter group
Equilibrium as it relates to nitrogen in the body Ans: When the
pressure of nitrogen is balanced between air and your body
Haldane surfacing ratio Ans: Originally 2:1 - Updated with new
research to 1.58:1
Tissue compartment half-time Ans: The time required for the
compartment to absorb or eliminate half of the pressure
, Page | 2
difference between what it started with and the ambient
pressure
M-Value of tissue Ans: The maximum allowable nitrogen (inert
gas) pressure in a specific tissue
NAUI recommendation for diving while pregnant Ans: Do not
dive while pregnant
Haldane tissue compartments Ans: Haldane - 5 compartments
Modern Computers - Apx. 16 compartments
Tissue compartment Ans: Mathematical model consisting of
multiple theoretical tissues and their relative halftimes
Fast compartments - short halftimes
Slow compartments - long halftimes
Ascent rate at altitude Ans: Slower than at sea level
Extend dive times with gas by Ans: Decreased nitrogen and
increased oxygen in breathing gas
RNT Ans: Residual Nitrogen Time
Tme already spent at the repetitive dive depth (dive tables)
Procedure for missed decompression stops Ans: 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
, Page | 3
SIT Ans: 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) Ans: Based on
20+ years of research pioneered by Kidd and Stubbs (1962)
Swiss Dive Tables Ans: 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: Ans: Use the Maximum Dive Time as your
Total Dive Time
Aching pains an hour after a dive might be: Ans:
Decompression sickness
ATA rating for most hyperbaric chambers for treating divers:
Ans: 6 ATA
Haldane Tissue Half-Times (Compartments) Ans: 5, 10, 20, 40,
75 Mins
High altitude dive Ans: Any dive at greater than 1000 feet
Ideal hyperbaric chamber for dive injury Ans: Multiplace,
double-lock chamber rated for service to six atmospheres
Repetitive Dive Ans: Any dive started within 24 hours after a
previous dive
