rdp Flashcards
How half times does it take to reach 98.4% (100%)
6 half times
1 HT 50%
2 HT 75%
3 HT 87.5%
4 HT 93.8 %
5 HT 96.9 %
6 HT 98.4%
A 60-minute tissue compartment requires _____________ to fill or empty completely, while a 120-minute compartment requires _____________.
6 half times to fill
60 x 6 = 360 minutes = 6 hours
120 x 6 = 720 min =12 hours
The Recreational Dive Planner uses a 60-minute tissue compartment to control its “Surface Interval Credit Table” because
if divers don’t exceed the NDLs, the slow 120-minute compartment can be virtually ignored.
The U.S. Navy selected the 120-minute tissue compartment to control their “Surface Interval Credit Table” because
they were designing tables that enabled decompression diving
True or False .. The tissue compartments considered within a decompression model are related directly to specific tissues of the body.
False
true or false …A single-tissue decompression model does not work for the human body because the amount and time required to absorb gas is dependent upon the type of tissue involved and the amount of blood flow to the tissue.
True
In constructing the U.S. Navy Tables _____________ tissue compartments were used to determine the NDLs. In determining the NDLs for the Recreational Dive Planner _____________ tissue compartments were used.
6 /14
true or false …
While several tissue compartments were used to determine the NDLs for both the Recreational Dive Planner and USN Tables, only one tissue compartment was used to control the gas “washout” during the surface interval.
true …
In terms of off-gassing, the slowest compartment controls a subsequent dive. In the case of the Navy Tables, they used the 120-minute compartment. The Recreational Dive Planner uses the 60-minute compartment to calculate nitrogen elimination.
The decompression-related problems encountered when diving at altitude occur because the diver begins his dive
at a lower pp02 and atmospheric pressure
true or false …
Because it was designed to allow multilevel diving, there is no need to convert actual depths into equivalent sea-level depths in order to the use Recreational Dive Planner at 300 metres above sea level or higher.
false
true or false … Because they are based on the same theoretical model, pressure groups may be transferred between the RDP Table and eRDPML.
true
Upon exiting the water a diver using the Recreational Dive Planner determines he is in pressure group J. Another diver who is using the U.S. Navy Tables also determines that he is in group J. Is it likely that the two divers have approximately the same dive profile?
No
A diver plans a dive to 30 metres for 20 minutes. Losing track of time, he notices that his bottom time is actually 24 minutes. Which of the following procedures should he institute in this situation?
8 mins at 5m. no diving for 6 hours
A diver plans a dive to 35 metres for 13 minutes. Upon surfacing he discovers that he misread his timing device. He was actually at depth for 21 minutes. Which of the following procedures should he institute in this situation?
02 monitor
