Delays up to 5 minutes in leaving the 50fsw and 40fsw oxygen stops

Longer delays may be associated with an increased risk of oxygen toxicity and should be avoided. Delays in Travel from 40 fsw to the Surface. Disregard any delays in travel from 40 fsw to the surface during surface decompression unless the diver exceeds the 5-minute interval. When the diver exceeds the 5-minute interval, the diver shall be treated for omitted decompression (see paragraph 14-4.10). Special Procedures for Diving with an Oxygen Partial Pressure Greater Than 1.3...

Bottom Time Partial Pressure

PpO2 Oxygen partial pressure in ata O2 Oxygen percentage in the mixture Example. A diver is at 250 fsw breathing a 17.0 percent oxygen mixture. The oxygen partial pressure is To dive in accordance with this section 1. Determine the bottom time that will be required to complete the task. 2. From Table 14-4, select the oxygen partial pressure that corresponds to this bottom time. If the bottom time is not exactly equal to the times listed in the table, round to the next longer bottom time. 3....

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Decompression Procedure tmergevvcy SWR -V Figure 14-6. Emergency Surface Decompression Dive Profile for a 249 fsw 18 Dive. Figure 14-6. Emergency Surface Decompression Dive Profile for a 249 fsw 18 Dive. 3. Surface the diver from 20 fsw when it is confirmed that the diver is breathing air. Example. A diver intends to dive to 300 fsw. Five minutes is spent at 20 fsw shifting from air to an 88 percent helium 12 percent oxygen mixture. Descent is then begun at 60 fsw min, but at 80 fsw the diver...