This means that there is less rounding when using the ERDPml giving lower pressure groups or longer dives or shorter surface intervals on some dives.īelow i have laid out the different ways the RDP table can be used, and the different types of questions you may be asked. The ERDPml has columns that only jump in five foot increments, 35ft, 40ft, 45ft, 50ft, 55ft and so on. The reason for this is that the table has columns for 35ft, 40ft, 50ft, 60ft and so on up to 140ft. The RDP table will, in many cases, give different answers to the same question calculated using the ERDPml.
Draw out a dive diagram, fill in the numbers from the question and then work the answer. One of the most important things when answering questions with the RDP table, like the ERDPml, is to follow a methodical approach.
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