Really?
While I understand that commercial diving and military diving are two seperate animals, I would think that this type of EP would be common knowledge.
From the USN Diving Manual Rev 6 Chapter 9, (regarding O2 convulsion in the water for Sur-D or in water air/O2 deco):
9-12.5 Oxygen Convulsion at the 30- or 20-fsw Water Stop
If symptoms progress to an oxygen convulsion despite the above measures, or if a convulsion occurs suddenly without warning, take the following action.
1. Shift both divers to air if this action has not already been taken.
2. Have the unaffected diver ventilate himself and then ventilate the stricken diver.
3. If only one diver is in the water, launch the standby diver immediately and have him ventilate the stricken diver.
4. Hold the divers at depth until the tonic-clonic phase of the convulsion has subsided. The tonic-clonic phase of a convulsion generally lasts 1–2 minutes.
5. At the end of the tonic-clonic phase, have the dive partner or standby diver ascertain whether the diver is breathing. The presence or absence of breath sounds will usually be audible over the diver communication system.
6. If the diver appears not to be breathing, have the dive partner or standby diver attempt to reposition the head to open the airway. Airway obstruction will be the most common reason why an unconscious diver fails to breathe.
7. If the diver is breathing, hold him at depth until he is stable, then surface decompress. Compute the number of chamber oxygen periods required by multiplying the remaining oxygen time at the stops by 1.1, dividing the total by 30 min, then rounding the result up to the next highest half period. One half period (15 minutes at 50 fsw) is the minimum requirement.
8. If surface decompression is not feasible, continue decompression on air in the water. Compute the remaining stop time on air at the depth of the incident by multiplying the remaining stop time on oxygen at that depth by the ratio of the air stop time to the oxygen time at that depth. If the shift to air occurs at 30 fsw, compute the remaining stop time on air at 30 fsw, then take the full 20-fsw air stop as prescribed in the Air Decompression Table.
9. If it is not possible to verify that the affected diver is breathing, leave the unaffected diver at the stop to complete decompression, and surface the affected diver and the standby diver at 30 fsw/min. The standby diver should attempt to maintain an open airway on the stricken diver during ascent. On the surface, the affected diver should receive any necessary airway support and be immediately recompressed and treated for arterial gas embolism in accordance with Figure 20-1.
From USN Diving Manual Rev 6 Chapter 14 (Mixed-Gas, Unconscious Diver On The Bottom):
14-4.18 Unconscious Diver on the Bottom.
An unconscious diver on the bottom consti-tutes a serious emergency. Only general guidance can be given here. Management decisions must be made on site, taking into account all known factors. The advice of a Diving Medical Officer shall be obtained at the earliest possible moment.
If the diver becomes unconscious on the bottom:
1. Make sure that the breathing medium is adequate and that the diver is breath-ing. Verify manifold pressure and oxygen percentage.
2. Check the status of any other divers.
3. Have the dive partner or standby diver ventilate the afflicted diver to remove any accumulated carbon dioxide in the helmet and ensure the correct oxygen concentration.
4. If there is any reason to suspect gas contamination, shift to the standby helium-oxygen supply and ventilate both divers, ventilating the non-affected diver first.
5. When ventilation is complete, have the dive partner or standby diver ascertain whether the diver is breathing. The presence or absence of breath sounds will be audible over the intercom.
6. If the diver appears not to be breathing, the dive partner/standby diver should attempt to reposition the diver’s head to open the airway. Airway obstruction will be the most common reason why an unconscious diver fails to breathe.
7. Check afflicted diver for signs of consciousness:
If the diver has regained consciousness, allow a short period for stabili-zation and then abort the dive.
If the diver remains unresponsive but is breathing, have the dive partner or standby diver move the afflicted diver to the stage. This action need not be rushed.
If the diver appears not to be breathing, maintain an open airway while moving the diver rapidly to the stage.
8. Once the diver is on the stage, observe again briefly for the return of consciousness.
If consciousness returns, allow a period for stabilization, then begin decompression.
If consciousness does not return, bring the diver to the first decompres-sion stop at a rate of 30 fsw/min (or to the surface if the diver is in a no-decompression status).
9. At the first decompression stop:
If consciousness returns, decompress the diver on the standard decom-pression schedule using surface decompression.
If the diver remains unconscious but is breathing, decompress on the standard decompression schedule using surface decompression.
If the diver remains unconscious and breathing cannot be detected in spite of repeated attempts to position the head and open the airway, an extreme emergency exists. One must weigh the risk of catastrophic, even fatal, decompression sickness if the diver is brought to the surface, versus the risk of asphyxiation if the diver remains in the water. As a general rule, if there is any doubt about the diver’s breathing status, assume he is breathing and continue normal decompression in the water. If it is absolutely certain that the diver is not breathing, leave the unaffected diver at his first decompression stop to complete decompression and surface the affected diver at 30 fsw/minute, deploying the standby diver as required. Recompress the diver immediately and treat for omitted decompression according to Table 14‑2.
