Decompression Theory and the Recreational Dive Planner

Using the RDP Table, you plan to make two dives, the first to 40 m/130 ft and the second to 12 m/40 ft. What is the no decompression limit for the first dive? Assuming your first dive is for 9 minutes and you have a one hour, 30 minute surface interval, what is the no decompression limit for the second dive?

10 minutes / 24 minutes

Using the RDP above ___________ requires the use of special procedures including the conversion of actual depth to theoretical depth. To use theoretical depth tables, you must know the ____________.

1000 feet / altitude of the dive

Using the RDP Table, what is the minimum surface interval required between a dive to 16 m/ 50 ft for 60 minutes, followed by a second dive to 14 m /40 ft for 70 minutes?

11 minutes

Using the eRDPML, you're planning a two-level multilevel dive. You plan to spend 18 minutes at your first level of 29 m/92 ft and then ascend to 20 m/65 ft for the remainder of the dive. What is the maximum time you can spend at your second depth level?

11 minutes (planning mode w/multilevel dive)

Flying after diving recommendations suggest that divers wait _____ hours after completing a single dive and _____ hours after completing multiple dives for several days before flying in a commercial jet airliner.

12 / 18

The U.S. Navy table repetitive dive credit is based on a _________, and the RDP's repetitive dive credit is based on a ________.

120 minute halftime / 60 minute halftime

Using the eRDPML, you plan to make two dives. The first dive will be to 28 m/95 ft for 14 minutes, followed by a one hour, 30 minute surface interval. The second dive will be to 12 m/40 ft. What is the no decompression limit for the second dive?

124 minutes (planning mode)

The RDP model is characterized by:

14 compartments and a 60 minute surface interval washout.

Using the eRDPML, what is the no decompression limit for a dive 28 m/95 ft?

22 minutes (planning mode)

Using the RDP Table, you plan to make three dives. The first will be to 29 m/95 ft for 15 minutes, followed by a one hour, 45 minute surface interval. The second will be to 21 m/67 ft for 20 minutes. If this is followed by a 52 minute surface interval, what is the no decompression limit for a repetitive dive to 21 m/67 ft?

25 minutes

Using the eRDPML, you have just made two dives, the first to 29 m/98 ft for 12 minutes, and the second to 23 m/59 ft for 20 minutes, with a 42 minute surface interval between them. What is the minimum required surface interval for a third dive to 15 m/54 ft for 40 minutes?

31 minutes (dive planning & surface interval)

Using the eRDPML, you plan to make three dives. The first will be to 19 m/63 ft for 30 minutes, followed by a 30 minute surface interval. The second will be to 15 m/54 ft for 27 minutes. If this is followed by a one hour, 40 minute surface interval, what is the no decompression limit for a repetitive dive to 14 m/48 ft?

63 minutes (planning mode)

The effect of the RDP's repetitive control compared to the U.S. Navy table's is that the RDP:

Gives approximately twice the credit for a given surface interval.

In a decompression model, the rate at which a theoretical tissue absorbs and releases nitrogen is called its:

Halftime

A dive computer provides more no-decompression time than a table because:

It eliminates unnecessary rounding by calculating the dive exactly.

The U.S. Navy tables were the standard for recreational diving at one time because:

Many years ago, recreational divers and instructors came from the military and merely adopted them for use.

You can rely on a Haldanean decompression model:

Only as far as it has been shown to work in tests and by field experience.

If a diver exceeded the no decompression limit for a dive by 5 minutes, but didn't realize it until after surfacing and boarding the dive boat, what procedures would the diver follow?

Remain on the surface, rest and be monitored for signs/symptoms of decompression sickness; wait at least 24 hours before diving again.

You cannot interchange Pressure Groups from the RDP with those of the U.S. Navy tables or other tables, or vice versa, because:

The tables are based on different models and the letter designations represent different theoretical nitrogen levels.

A dive computer: a.) follows the same theoretical basis as dive tables. b.) calls for following the same general recommendations as when diving with tables. c.) should not be shared by two or more divers on a dive. d.) All of the above

d.) All of the above