Get fast and accurate with the Recreational Dive Planner and the eRDPml — pressure groups, surface intervals, multilevel dives, and no-decompression limits — through unlimited practice questions.
Dive-planning questions trip up more Divemaster and Instructor candidates than any other topic, because they demand accurate, repeatable table work under time pressure. Practice until reading the RDP and eRDPml is second nature.
A taste of the style. In the app you get a fresh set every time.
When using the Recreational Dive Planner, if your exact depth isn't listed on the table, you should:
Why: Always round depth (and time) UP to the next listed value on the RDP — the more conservative choice.
The primary purpose of a surface interval between two dives is to:
Why: A surface interval lets the body off-gas nitrogen, moving the diver to a lower pressure group before the next dive.
The RDP is the printed table (and wheel) version of the Recreational Dive Planner; the eRDPml is the electronic multilevel version. Both plan no-decompression dives and are tested on the Divemaster and Instructor exams.
It requires accurate, repeatable table lookups — round depth and time up, track pressure groups, and apply surface intervals correctly. Repetition is the only way to make it reliable, which is what unlimited practice gives you.
Start practicing now — free to try.
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