Page | 1
NAUI Instructor Questions with
Detailed Verified Answers
Question:Henry's Law
Ans: The amount of gas dissolved in a liquid is directly related to its partial
pressure above the liquid.
Question: Relationship of gas solubility and temperature
Ans: Solubility of gas decreases with increasing temperature
(INVERSELY RELATED)
Question: Inert gas loading in relation to body tissue
Ans: Body tissue absorbs more inert gas as depth increases
Question: Benefit of Dive Computer compared to Dive Tables
Ans: Gives the diver credit for shallow portions of the dive
Question: Cold or Strenuous dive planning rule
Ans: Use the next greater dive TIME to determine letter group
Question: Equilibrium as it relates to nitrogen in the body
, Page | 2
Ans: When the pressure of nitrogen is balanced between air and your body
Question: Haldane surfacing ratio
Ans: Originally 2:1 - Updated with new research to 1.58:1
Question: Tissue compartment half-time
Ans: The time required for the compartment to absorb or eliminate half of the
pressure difference between what it started with and the ambient pressure
Question: M-Value of tissue
Ans: The maximum allowable nitrogen (inert gas) pressure in a specific tissue
Question: NAUI recommendation for diving while pregnant
Ans: Do not dive while pregnant
Question: Haldane tissue compartments
Ans: Haldane - 5 compartments
Modern Computers - Apx. 16 compartments
Question: Tissue compartment
, Page | 3
Ans: Mathematical model consisting of multiple theoretical tissues and their
relative halftimes
Fast compartments - short halftimes
Slow compartments - long halftimes
Question: Ascent rate at altitude
Ans: Slower than at sea level
Question: Extend dive times with gas by
Ans: Decreased nitrogen and increased oxygen in breathing gas
Question: RNT
Ans: Residual Nitrogen Time
Tme already spent at the repetitive dive depth (dive tables)
Question: 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
Question: SIT
NAUI Instructor Questions with
Detailed Verified Answers
Question:Henry's Law
Ans: The amount of gas dissolved in a liquid is directly related to its partial
pressure above the liquid.
Question: Relationship of gas solubility and temperature
Ans: Solubility of gas decreases with increasing temperature
(INVERSELY RELATED)
Question: Inert gas loading in relation to body tissue
Ans: Body tissue absorbs more inert gas as depth increases
Question: Benefit of Dive Computer compared to Dive Tables
Ans: Gives the diver credit for shallow portions of the dive
Question: Cold or Strenuous dive planning rule
Ans: Use the next greater dive TIME to determine letter group
Question: Equilibrium as it relates to nitrogen in the body
, Page | 2
Ans: When the pressure of nitrogen is balanced between air and your body
Question: Haldane surfacing ratio
Ans: Originally 2:1 - Updated with new research to 1.58:1
Question: Tissue compartment half-time
Ans: The time required for the compartment to absorb or eliminate half of the
pressure difference between what it started with and the ambient pressure
Question: M-Value of tissue
Ans: The maximum allowable nitrogen (inert gas) pressure in a specific tissue
Question: NAUI recommendation for diving while pregnant
Ans: Do not dive while pregnant
Question: Haldane tissue compartments
Ans: Haldane - 5 compartments
Modern Computers - Apx. 16 compartments
Question: Tissue compartment
, Page | 3
Ans: Mathematical model consisting of multiple theoretical tissues and their
relative halftimes
Fast compartments - short halftimes
Slow compartments - long halftimes
Question: Ascent rate at altitude
Ans: Slower than at sea level
Question: Extend dive times with gas by
Ans: Decreased nitrogen and increased oxygen in breathing gas
Question: RNT
Ans: Residual Nitrogen Time
Tme already spent at the repetitive dive depth (dive tables)
Question: 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
Question: SIT
