The Recreational Dive Planner - Metric

Question 1

Decompression Models

A 60-minute tissue compartment requires _____________ to fill or empty completely, while a 120-minute compartment requires _____________.

a) 1 hour/2 hours
b) 2 hours/4 hours
c) 6 hours/12 hours
d) 12 hours/24 hours

Answer 1

c) 6 hours/12 hours

Question 2

Decompression Models

The U.S. Navy selected the 120-minute tissue compartment to control their “Surface Interval Credit Table” because

a) they didn’t know other compartments could be used.
b) they were designing tables that enabled decompression diving.
c) as most of their diving is surface air supplied, a different decompression model had to be used.
d) this was the easiest way to account for individual differences in physiology.

Answer 2

b) they were designing tables that enabled decompression diving.

Question 3

Decompression Models

The Recreational Dive Planner uses a 60-minute tissue compartment to control its “Surface Interval Credit Table” because

a) there are no safety factors built into its design.
b) the decompression stops are shorter than the Navy Tables.
c) it is a better way to account for individual differences in physiology.
d) if divers don’t exceed the NDLs the slow 120-minute compartment can be virtually ignored.

Answer 3

d) if divers don’t exceed the NDLs the slow 120-minute compartment can be virtually ignored.

Question 4

Decompression Models

The tissue compartments considered within a decompression model are related directly to specific tissues of the body.
True
False

Answer 4

False

Question 5

Decompression Models

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
False

Answer 5

True

Question 6

Decompression Models

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.

a) 6/14
b) 6/6
c) 12/12
d) 6/34

Answer 6

a) 6/14

Question 7

Decompression Models

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
False

Answer 7

True

Question 8

Altitude Diving

The decompression-related problems encountered when diving at altitude occur because the diver begins his dive

a) at an atmospheric pressure less than that at sea level.
b) at an atmospheric pressure more than that at sea level.
c) with a reduced percentage of nitrogen than that at sea level.
d) with a reduced percentage of oxygen than that at sea level.

Answer 8

a) at an atmospheric pressure less than that at sea level.

Question 9

Altitude Diving

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.
True
False

Answer 9

False

Question 10

Decompression Theory

Because they are based on the same theoretical model, pressure groups may be transferred between the RDP Table and eRDPML.
True
False

Answer 10

True

Question 11

Decompression Theory

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?
Yes
No

Answer 11

No

Question 12

RDP and eRDPml

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?

a) Immediately ascend to 5 metres and make a stop for 15 minutes; avoid diving for at least 24 hours.
b) Immediately ascend to 5 metres and make a stop for 8 minutes; avoid diving for at least 6 hours.
c) Immediately ascend to 5 metres and make a stop for 3 minutes.
d) Immediately surface - rest - be monitored for signs of decompression sickness - breathe 100% oxygen and do not dive for at least 24 hours.

Answer 12

b) Immediately ascend to 5 metres and make a stop for 8 minutes; avoid diving for at least 6 hours.

Question 13

RDP and eRDPml

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?

a) Reenter the water and decompress at 5 metres for 15 minutes; avoid diving for 24 hours.
b) Reenter the water and decompress at 5 metres for 8 minutes; avoid diving for 6 hours.
c) Remain on the surface - rest - be monitored for signs of decompression sickness - breathe 100% oxygen and do not dive for at least 24 hours.
d) Immediately seek medical attention and recompression treatment.

Answer 13

c) Remain on the surface - rest - be monitored for signs of decompression sickness - breathe 100% oxygen and do not dive for at least 24 hours.

Question 14

RDP and eRDPml

Using the Table or eRDPML, what is the no-decompression limit for a dive to 29 metres?

a) 20 minutes
b) 29 minutes
c) 21 minutes
d) 22 minutes

Answer 14

a) 20 minutes

Question 15

RDP and eRDPml

Using the eRDPML, what is the no-decompression limit for a dive to 27 metres?

a) 20 minutes
b) 22 minutes
c) 23 minutes
d) 29 minutes

Answer 15

c) 23 minutes

Question 16

RDP and eRDPml

You are to use the Recreational Dive Planner Table or eRDPML: A diver exits the water at 10:45 a.m. after a dive to 24 metres for 21 minutes. At 11:15 a.m. he reenters the water for a 36 minute dive to 18 metres. If he wishes to make a third dive after only a 2 minute surface interval, what is the maximum depth to which he may dive and remain for at least 20 minutes?

a) 12 metres
b) 15 metres
c) 18 metres
d) The third dive cannot be made with such a short surface interval.

Answer 16

d) The third dive cannot be made with such a short surface interval.

Question 17

RDP and eRDPml

You are to use the Recreational Dive Planner Table or eRDPML: A diver is planning a dive to 20 metres for 38 minutes. What is the minimum amount of time the diver would have to spend at the surface if he wished to repeat the exact same profile?

a) 2 hours and 31 minutes
b) 2 hours and 28 minutes
c) 1 hour and 43 minutes
d) 1 hour and 39 minutes

Answer 17

a) 2 hours and 31 minutes

Question 18

RDP and eRDPml

You are to use the Recreational Dive Planner Table or eRDPML: A diver is planning a series of 3 dives. Assume he will use minimum surface intervals, follow all Recreational Dive Planner rules and dive the following exact profiles: Dive 1 - 24 metres for 26 minutes; Dive 2 - 12 metres for 85 minutes; Dive 3 - 11 metres for 61 minutes. In minutes, approximately how long will the entire dive profile take to complete—from start to finish?

a) 201 minutes
b) 207 minutes
c) 356 minutes
d) 362 minutes

Answer 18

d) 362 minutes

Question 19

RDP and eRDPml

You are to use the eRDPML: A diver exits the water at 1:30 p.m. after a dive to 19 metres for 35 minutes. He reenters the water at 2:20 p.m. for a dive to 17 metres for 25 minutes. How soon could the diver reenter the water for a dive to 15 metres for 38 minutes?

a) 33 minutes
b) 37 minutes
c) 1 hour
d) 3 hours

Answer 19

a) 33 minutes

Question 20

RDP and eRDPml

You are to use the eRDPML: A diver exits the water at 10:40 a.m. after a dive to 28 metres for 20 minutes. He reenters the water at 12:20 p.m. for a dive to 19 metres for 27 minutes. How soon could the diver reenter the water for a dive to 17 metres for 30 minutes?

a) 37 minutes
b) 41 minutes
c) 1 hour
d) 3 hours

Answer 20

a) 37 minutes

Question 21

Flying After Diving, and Altitude Diving

A diver exits the water at 10:00 a.m. after a dive to 18 metres for 50 minutes. He has made no previous dives. What is the soonest this diver should board a commercial airliner for his flight home?

a) 2:00 p.m.
b) 10:00 p.m.
c) When he enters pressure group D
d) 10:00 a.m. the next day

Answer 21

b) 10:00 p.m.

Question 22

Flying After Diving, and Altitude Diving

A diver has been on a diving vacation for a week, during which he made in excess of 20 dives. He exits the water at 12:00 noon. What is the soonest this diver should board a commercial airliner for his flight home?

a) 2:00 p.m.
b) After 6:00 a.m. the next day
c) When he enters pressure group D
d) 12:00 noon the next day

Answer 22

b) After 6:00 a.m. the next day

Question 23

Flying After Diving, and Altitude Diving

Upon surfacing a diver realizes he has dived the following profile: 29 metres for 23 minutes. What is the soonest this diver should board a commercial airliner for his flight home?

a) 12 hours after exiting the water
b) more than 18 hours after exiting the water
c) 24 hours after exiting the water
d) Only on the advice of a physician

Answer 23

b) more than 18 hours after exiting the water

Question 24

eRDPml and Multilevel Diving

During a multilevel dive, a diver spends 10 minutes at a depth of 34 metres. If he then wishes to ascend to 26 metres, what would be his remaining no-decompression time during the shallow portion of the dive?

a) 19 minutes
b) 21 minutes
c) 28 minutes
d) The dive cannot be made as planned as it is beyond the parameters allowed for a multilevel exposure.

Answer 24

d) The dive cannot be made as planned as it is beyond the parameters allowed for a multilevel exposure.

Question 25

eRDPml and Multilevel Diving

A diver is planning a multilevel dive. He wishes to stay at 34 metres for 10 minutes, then ascend to 22 metres for 12 minutes. What will his pressure group be upon exiting the water?

a) Group P
b) Group O
c) Group I
d) The dive cannot be made as planned.

Answer 25

b) Group O

Question 26

eRDPml and Multilevel Diving

A diver is planning a multilevel dive. He wishes to stay at 34 metres for 5 minutes, then ascend to 24 metres for 22 minutes. What will his pressure group be upon exiting the water?

a) Group R
b) Group S
c) Group K
d) The dive cannot be made as planned as it is outside the allowable parameters for a multilevel exposure.

Answer 26

d) The dive cannot be made as planned as it is outside the allowable parameters for a multilevel exposure.

Question 27

eRDPml and Multilevel Diving

During his safety stop, a diver determines he has dived the following profile: 28 metres for 15 minutes, ascending to 18 metres for an additional 23 minutes. What action should he take as a result?

a) Plan any repetitive dive assuming his ending pressure group is T.
b) Remain at the safety stop for 8 minutes - upon surfacing; do not dive for 6 hours.
c) Remain at the safety stop for 15 minutes - upon surfacing; do not dive for 24 hours.
d) Immediately surface - rest - monitor himself for signs of decompression sickness - breath 100% oxygen and not dive for at least 6 hours.

Answer 27

b) Remain at the safety stop for 8 minutes - upon surfacing; do not dive for 6 hours.