Air/O2/Sur-D Charting Flashcards
What is the MAX descent rate IN THE WATER?
75 fpm
What are the pneumofathometer correction factors to calculate MAX DEPTH?
0-100 +1
101-200 +2
201-300 +4
301-400 +7
What is the general ascent rate?
What is the exception?
30 fpm
SUR-D dives, 40fpm for last 40 ft ascent to surface
If no Repet Group Designator is given - how long must a diver wait to dive again?
18 hours
During an Air/O2 decompression - when do diver start breathing O2?
30 fsw
20 if there is no 30fsw stop
When must Air Breaks occur?
every 30 mins
*unless the final or total oxygen time does not exceed 35 mins in which case no air breaks are required
When completing the 20fsw O2 stop, does the diver take an air break?
no - they ascend while continuing on 100% O2
Where is the Travel/Shift/Vent time charted?
At 30fsw (added to O2 stop) *unless first stop isn't until 20fsw, in which case T/S/V time would be added to the 20fsw O2 stop.
Travel/Shift/Vent time should be UNDER ____ minutes?
3 mins
After which Air Break stop should SUR-D divers ascend directly to the surface?
At what rate?
40 fsw
40 fpm (so it only takes 1 minute)
What are the components of a SUR-D Surface Interval?
What is the max time this should take?
Ascent from 40 fsw (1 min)
Undress time
Descent in chamber (50fsw at 100fpm = 30sec)
5 mins
*if 5-7 mins extend first 15 mins at 50 to 30 mins
if > 7 mins - treat with TT5/6
Oxygen period 1 is always at _____
2-4 are spent at ____
5-8 are spent at ____
15 mins at 50, 15 mins at 40 (unless doubling 50 fsw period for prolonged SI)
40fsw
30fsw
When you experience a delay (>1min) on ascent deeper than 50fsw, what do you do?
What about shallower than 50fsw?
add to bottom time and recompute table/schedule. This includes between Air stops. If already shallower than first stop on new table, add that time to the time spent at current depth
add time to divers 1st decompression stop (ie 1 min delay at 45 feet will incur 1 additional minute at first stop = 2 total extra minutes to the dive)
What do you do if you have a delay between air stops shallower than 50fsw?
nothing, just pick up where you left off
If you experience a delay (>1 min) leaving an O2 stop at 30 fsw to 20 fsw, what should you do?
subtract the delay time from the 20fsw O2 stop time
