Section 5 Flashcards
One way to find a minimum surface interval with a computer is to periodically check the no stop times for the depth you want, between dives
True/false
True
I can use the RDP Table or eRDPml to find the exact time my dive computer requires for a minimum surface interval
True/false
False
The RDP Table or eRDPml will give you a useful estimate of your computer’s minimum surface interval, but it will probably not be exactly the same
Going to altitude after diving may be a problem because the
A. Lower pressure can increase DCS risk
B. Higher pressure can increase DCS risk
C. Lower pressure can increase oxygen problems
D. Higher pressure can increase oxygen problems
A. Lower pressure can increase DCS risk
The difference between flying after diving and altitude diving is that when flying after diving, I go to altitude after a dive, and in altitude diving, I begin and end a dive at altitude
True/false
True
My buddy and I have made two no stop dives a day for the last two days. Based on current recommendations, we should wait at least \_\_\_\_ after our last dive before flying A. 6 hours B. 12 hours C. 18 hours D. 24 hours
C. 18 hours
Flying after diving recommendations may change over time, so I should check online and print sources to keep up with and follow the most current ones
True/false
True
When diving at an altitude of \_\_\_\_ or higher, I need to use altitude diving procedures A. 150 m/500 ft B. 300 m/1000 ft C. 450 m/1500 ft D. 600 m/2000 ft
B. 300 m/1000 ft
Cold and/or strenuous dives may be a problem win respect to DCS risk because
A. I may end the dives with more dissolved nitrogen than calculated by dive computer or tables
B. It is easier to ascend too fast when I make a cold or strenuous dive
C. Cool water can shut down my computer
A. I may end the dives with more dissolved nitrogen than calculated by dive computer or tables
If I’m cold or exert myself strenuously during a dive, I should
A. Not make a safety stop
B. Be even more conservative
B. Be even more conservative
Using the RDP Table or eRDPml, I should calculate a cold or strenuous dive as
A. 4 m/10 ft shallower than the actual depth
B. 4 m/10 ft deeper than the actual depth
C. Having no surface interval
D. Requiring emergency decompression
B. 4 m/10 ft deeper than the actual dive
If I go over a no stop limit, I
A. Must surface at a very slow rate
B. Will have to make one or more emergency decompression stops
B. Will have to make one or more emergency decompression stops
The depths and times of emergency decompression stops are
A. Given by my dive computer
B. Standardized as 6 m/20 ft and 3 m/10 ft
C. Not important, as long as I make the stops
A. Given by my dive computer
If I should surface without making an emergency decompression stop, I should get a fresh cylinder of air and then go back underwater to make the stop
True/false
False
If you miss an emergency decompression stop, relax, breathe emergency oxygen and monitor yourself for DCS symptoms, and don’t dive for at least 24 hours
The term “decompression illness”
A. Is another term for DCS
B. Refers to lung overexpansion injuries
C. Includes both lung overexpansion injuries and DCS
C. Includes both lung overexpansion injuries and DCS
Treatment for most cases of DCI requires ____
A. Recompression in a chamber
B. Long sleep
C. Putting the diver back underwater
A. Recompression in a chamber
Signs and symptoms of gas narcosis include (choose all that apply
A. Discomfort in the ears and /or sinuses
B. Loss of coordination
C. Slowed thinking
D. Ignoring or disregard for safety
B, C, D
Gas narcosis is thought to be harmful itself
True/false
False
Gas narcosis is not thought to be harmful itself. The hazard is that it impairs the good judgement, clear thinking and timely responses you need to avoid and manage problems underwater
Gas narcosis is thought to be caused by the increased amount of dissolved gases in body tissues slowing nerve impulses that travel in the brain and nervous system
True/false
True
Most divers usually begin to notice gas narcosis at a depth of approximately A. 1& m/60 ft B. 30 m/100 ft C. 40 m/130 ft D. 50 m/165 ft
B. 30 m/100 ft
Before a dive, I feel a bit tired. This may make narcosis
A. Noticeable at a shallower depth
B. Unlikely within recreational depth limits
C. Noticeable at a deeper depth
A. Noticeable at a shallower depth
If I am diving and begin to feel intoxicated, I should
A. Signal my buddy to stay close
B. Stop my descent and go no deeper
C. Breathe deeply until my head clears
D. Signal my buddy to ascend to a shallower depth
D. Signal my buddy to ascend to a shallower depth
Underwater navigation helps me save air and can help me get to an exit point the shortest way if I have a problem
True/false
True
The \_\_\_\_ is/are always my direction of travel when navigating with a compass A. North needle B. Lubber line C. Bezel with index marks D. Heading references
B. Lubber line
I should hold my compass so the \_\_\_\_ is/are aligned with the centerline of my body A. North needle B. Lubber line C. Bezel with index marks D. Heading references
B. Lubber line
