(2024 Exam) USN Dive Man Air Ep's

Question 1

The following are considered exceptional exposure dive:

Answer 1

• Any air dive deeper that 190’
• Any in-water “D” dive w/ a total “D” time on air or air/O2 greater than :90.
• Any SurDO2 dive with a chamber O2 time greater than 120 minutes (4 O2 periods)

NOTE: The CO must have approval to conduct planned exceptional exposure dives.

Question 2

Delay > :01 deeper than 50fsw?

Answer 2

Round up the delay time to the next whole minute and add it to the bottom time. Recompute table and schedule. Pick up new “D” at current depth. Perform any deeper stops at current depth. DO NOT GO DEEPER.

Question 3

Delay > :01 shallower than 50fsw?

Answer 3

Round delay up to next whole minute add delay time to the divers first Decompression stop.

Question 4

Delay > :01 leaving air stop or between air stops deeper than 50fsw?

Answer 4

Add delay up to the bottom time and recalculate the required “D”. Pick up any new schedule at the present or subsequent stop if delay occurs between stops. Ignore any missed stops or time deeper than the depth at witch the delay occurred.

Question 5

Delay leaving O2 stop at 30fsw or between O2 stops at 30 and 20fsw.

Answer 5

Subtract delay from subsequent 20fsw O2 time. Take air break after :30 on O2. Ignore any time spent on air.

Question 6

Loss of O2 @ 30 or 20-fsw stop after the divers has been shifted to O2?

Answer 6

• shift diver back to air
• If you get it back quickly, re-vent and Resume @ POI. Consider any time spent on air as dead time
• If chamber avail, Sur “D”. Multiply remaining O2 by 1.1 divide by 30, round up to next half period.
• If the problem can’t be corrected and no recompression chamber avail, continue on air. Compute remaining time on air by multiplying the air/O2 ratio by the remaining air time and rounding up.

Question 7

Contaminated O2 supply?

Answer 7

• Properly align system
• Re-Ventilate each diver for ::20.
• Restart O2 time

Question 8

CNS O2 tox (Non-Con) @ 30 or 20 FSW?

Answer 8

• Initiate Sur D if Chamber available
• Shift the console to air
• Compute the number of Chamber periods by the 1.1 method.
• If no Chamber and the event occurs @ 30fsw, up 10 & shift. Vent both divers, the affected diver first. Complete “D” @ 20ft. Compute time on O2 @ 20 by multiplying the missed time at 30 by the air/O2 ratio. Add this time to the air time @ 20.
• If the event occurs @ 20fsw, shift to air. Vent both divers, effected first. Complete D at 20fsw by multiplying the remaining stop time by air/O2 ratio.

Question 9

O2 Convulsion @ 30 or 20 FSW?

Answer 9

• Shift Divers to air
• Ventilate, unaffected first then effected.
• If only one Diver launch standby
• Hold Divers at depth until the tonic-clonic phase of the convulsion has subsided.
• Check that the Diver is breathing.
• If he is, hold depth until they are stable, then Sur “D”.
• If Sur “D” is not avail, “D” on air, multiply remaining time by air/O2 ratio.
• one last part to this EP, on next CARD?!?

Question 10

Convulsion @ 20-30fsw, diver is not breathing Or not possible to tell @ end of Clonic/tonic phase?

Answer 10

• Leave the unaffected diver at stop to complete “D”.
• Surface effected and Standby at 30fsw/min. Standby should attemp to maintain airway.
• On Sur, effected diver should receive necessary airway support & be treated for AGE IAW fig 17-1.