NAUI INSTRUCTOR SCHOOL EXAM WITH
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
Slack tide - ANSWERS-The period of change in a tidal current
from a flood tide to an ebb tide (or an ebb tide to a flood
tide)
The terms "set" and "drift" refer to a current's: - ANSWERS-
Direction and velocity
Modern Cylinders - ANSWERS-Steel or Aluminum
Internal valve types for first stages - ANSWERS-Diaphragm &
Pistol
,Most common SPG - ANSWERS-Sealed Bourdon Tube
Two most common computer models - ANSWERS-Tissue &
Table based
Two Stage regulator - ANSWERS-Reg reduced cylinder
pressure to ambient pressure in two steps
Purpose of a Hydrostatic test - ANSWERS-To determine
permanent expansion of a cylinder
Modern regulator performance is defined in terms of -
ANSWERS-Max respiratory work level
Alpha flag represents - ANSWERS-A vessel restricted in its
ability to maneuver
Cold or Strenuous dive planning rule - ANSWERS-Use the
next greater dive TIME to determine letter group
Equilibrium as it relates to nitrogen in the body - ANSWERS-
When the pressure of nitrogen is balanced between air and
your body
, Haldane surfacing ratio - ANSWERS-Originally 2:1 - Updated
with new research to 1.58:1
Tissue compartment half-time - 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 - ANSWERS-The maximum allowable
nitrogen (inert gas) pressure in a specific tissue
NAUI recommendation for diving while pregnant -
ANSWERS-Do not dive while pregnant
Haldane tissue compartments - ANSWERS-Haldane - 5
compartments
Modern Computers - Apx. 16 compartments
Tissue compartment - ANSWERS-Mathematical model
consisting of multiple theoretical tissues and their relative
halftimes
Fast compartments - short halftimes
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
Slack tide - ANSWERS-The period of change in a tidal current
from a flood tide to an ebb tide (or an ebb tide to a flood
tide)
The terms "set" and "drift" refer to a current's: - ANSWERS-
Direction and velocity
Modern Cylinders - ANSWERS-Steel or Aluminum
Internal valve types for first stages - ANSWERS-Diaphragm &
Pistol
,Most common SPG - ANSWERS-Sealed Bourdon Tube
Two most common computer models - ANSWERS-Tissue &
Table based
Two Stage regulator - ANSWERS-Reg reduced cylinder
pressure to ambient pressure in two steps
Purpose of a Hydrostatic test - ANSWERS-To determine
permanent expansion of a cylinder
Modern regulator performance is defined in terms of -
ANSWERS-Max respiratory work level
Alpha flag represents - ANSWERS-A vessel restricted in its
ability to maneuver
Cold or Strenuous dive planning rule - ANSWERS-Use the
next greater dive TIME to determine letter group
Equilibrium as it relates to nitrogen in the body - ANSWERS-
When the pressure of nitrogen is balanced between air and
your body
, Haldane surfacing ratio - ANSWERS-Originally 2:1 - Updated
with new research to 1.58:1
Tissue compartment half-time - 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 - ANSWERS-The maximum allowable
nitrogen (inert gas) pressure in a specific tissue
NAUI recommendation for diving while pregnant -
ANSWERS-Do not dive while pregnant
Haldane tissue compartments - ANSWERS-Haldane - 5
compartments
Modern Computers - Apx. 16 compartments
Tissue compartment - ANSWERS-Mathematical model
consisting of multiple theoretical tissues and their relative
halftimes
Fast compartments - short halftimes
