We will start with the DSAT Air Tables. simply known as the Recreational
Dive Planner, RDP.

Using your DSAT Air Table, position the card so it looks like what you
see above.
Dive tables, what are they? Why do they exist? Why do I need to understand
how to use a dive table? If I have and use a computer, do I still need to know
how to use a dive table?
Dive tables may be found in many forms. They may be online, on a hard
plastic, water proof card, they may be flexible and/or foldable but what they
all contain is a method to calculate our bottom times, surface interval times
based on our planned depth, time at depth and our time between dives.
Is it important to know how to work your dive tables? One question
asked “If I’m wearing a computer and the computer calculates
all that stuff about my depths, times, surface times, and tells
me when to come up, …