PADI Recreational Dive Planner (RDP) 2

Question 1

On the RDP, what does 'Residual Nitrogen Time' (RNT) represent?

Accepted Answer

The equivalent time you would need to spend at a depth to have the same nitrogen as you currently carry

Answer

RNT is the time you must add to your actual bottom time to account for nitrogen already in your body from a previous dive.

Question 2

When planning a repetitive dive using the RDP, what is the Total Bottom Time (TBT)?

Accepted Answer

The RNT plus the ABT

Answer

Total Bottom Time equals Residual Nitrogen Time plus Actual Bottom Time, and it must not exceed the no-decompression limit for that depth.

Question 3

After a dive to 60 feet for 40 minutes, you surface as pressure group 'N'. What is the MINIMUM surface interval before your next dive?

Accepted Answer

10 minutes

Answer

PADI's RDP requires a minimum surface interval of 10 minutes before any repetitive dive regardless of pressure group.

Question 4

Which RDP table is used to find your pressure group AFTER a surface interval?

Accepted Answer

Table 2 – The Surface Interval Credit Table

Answer

Table 2, the Surface Interval Credit Table, shows how your pressure group decreases during a surface interval.

Question 5

On Table 3 of the RDP, what two values does a diver need to look up their Residual Nitrogen Time?

Accepted Answer

Starting pressure group and planned depth

Answer

Table 3 requires the diver's starting pressure group (after surface interval) and the planned depth to find the RNT.

PADI - Professional Association of Diving Instructors Practice Test