Air Diving Supervisor KEY EXAM QUESTIONS
AND CORRECT ANSWERS
If the air decompression table does not list a repetitive group designator for a dive, what must
your surface interval be? - CORRECT ANSWERS No repet dives are permitted below 20 fsw
on that table schedule. The diver must have an 18 hour surface interval before making another
diver deeper than 20 fsw.
What is computed when surface decompression is elected while breathing O2 from 30 and/or
20 fsw stop? - CORRECT ANSWERS The number of chamber periods and is done so by
multiplying the remaining O2 time at that stop by 1.1 then dividing by :30. Round up to the next
half period.
What depth does surface decompression start in the water and down to in the chamber? -
CORRECT ANSWERS Sur D starts after completion at the 40' stop in the water. The diver is
compressed to 50' in the chamber.
In Sur D, how long are chamber periods/half periods and how many can you spend at what
depth? - CORRECT ANSWERS One chamber period is :30 while a half period is :15. Your
first half period (:15) is spent at 50 fsw, travel to 40 fsw where you spend the second half (:15)
of your first period. Periods 2-4 spent at 40 fsw. Remaining O2 periods spent at 30 fsw.
Who can approve surface supplied air diving, planned exceptional exposure dives? - CORRECT
ANSWERS The CNO. Due to a significantly higher risk of DCS and CNS O2 toxicity, planned
exceptional exposure dives shall not be conducted except by specific authorization from the
CNO.
Who can approve decompression open circuit SCUBA dives? - CORRECT ANSWERS The CO
or OIC. Open circuit SCUBA dives requiring decompression may be made only when considered
absolutely necessary and authorized by the CO or OIC.
, Minimum manning for SCUBA 1&2 divers. - CORRECT ANSWERS 4 & 4.
Single diver, dive sup, standby diver, dive tender
Buddy pair divers, dive sup, standby diver
What are considered exceptional exposure dives? - CORRECT ANSWERS 1.) Any dive
deeper than 190 fsw.
2.) In water dive with decompression on air/O2 greater than :90.
3.) Any Sur D with a chamber O2 time greater than :120 (four O2 periods).
What five criteria must a dive brief cover? - CORRECT ANSWERS 1.) Dive Objective / Tasks
2.) Hazards
3.) Limits and restraints (max depth, bottom time etc.)
4.) Station assignments
5.) Assistance in emergencies
What are the three levels of O.R.M.? - CORRECT ANSWERS 1.) In depth
2.) Deliberate
3.) Time critical
Which level of O.R.M. covers "I AM IS"? - CORRECT ANSWERS Deliberate.
I-Identify hazards
A-Assess hazards
M-Make risk decisions
I-Implement Control's
S-Supervise
AND CORRECT ANSWERS
If the air decompression table does not list a repetitive group designator for a dive, what must
your surface interval be? - CORRECT ANSWERS No repet dives are permitted below 20 fsw
on that table schedule. The diver must have an 18 hour surface interval before making another
diver deeper than 20 fsw.
What is computed when surface decompression is elected while breathing O2 from 30 and/or
20 fsw stop? - CORRECT ANSWERS The number of chamber periods and is done so by
multiplying the remaining O2 time at that stop by 1.1 then dividing by :30. Round up to the next
half period.
What depth does surface decompression start in the water and down to in the chamber? -
CORRECT ANSWERS Sur D starts after completion at the 40' stop in the water. The diver is
compressed to 50' in the chamber.
In Sur D, how long are chamber periods/half periods and how many can you spend at what
depth? - CORRECT ANSWERS One chamber period is :30 while a half period is :15. Your
first half period (:15) is spent at 50 fsw, travel to 40 fsw where you spend the second half (:15)
of your first period. Periods 2-4 spent at 40 fsw. Remaining O2 periods spent at 30 fsw.
Who can approve surface supplied air diving, planned exceptional exposure dives? - CORRECT
ANSWERS The CNO. Due to a significantly higher risk of DCS and CNS O2 toxicity, planned
exceptional exposure dives shall not be conducted except by specific authorization from the
CNO.
Who can approve decompression open circuit SCUBA dives? - CORRECT ANSWERS The CO
or OIC. Open circuit SCUBA dives requiring decompression may be made only when considered
absolutely necessary and authorized by the CO or OIC.
, Minimum manning for SCUBA 1&2 divers. - CORRECT ANSWERS 4 & 4.
Single diver, dive sup, standby diver, dive tender
Buddy pair divers, dive sup, standby diver
What are considered exceptional exposure dives? - CORRECT ANSWERS 1.) Any dive
deeper than 190 fsw.
2.) In water dive with decompression on air/O2 greater than :90.
3.) Any Sur D with a chamber O2 time greater than :120 (four O2 periods).
What five criteria must a dive brief cover? - CORRECT ANSWERS 1.) Dive Objective / Tasks
2.) Hazards
3.) Limits and restraints (max depth, bottom time etc.)
4.) Station assignments
5.) Assistance in emergencies
What are the three levels of O.R.M.? - CORRECT ANSWERS 1.) In depth
2.) Deliberate
3.) Time critical
Which level of O.R.M. covers "I AM IS"? - CORRECT ANSWERS Deliberate.
I-Identify hazards
A-Assess hazards
M-Make risk decisions
I-Implement Control's
S-Supervise
