NAUI INSTRUCTOR COMPREHENSIVE DIVE
SAFETY AND TEACHING REVIEW SHEET
FULL SOLUTIONS
●● 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)
SAFETY AND TEACHING REVIEW SHEET
FULL SOLUTIONS
●● 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)
