PADI Dive Planner
The purpose of the Recreational Dive Planner is to make all dives no decompression dives. Proper planning assures that all dives, single or repetitive, are within the no decompression limits by controlling the length of the dive, the depth of the dive, and the surface interval between dives.
Use of the Recreational Dive Planner requires having and using an accurate depth gauge, an underwater timer, a slate and pencil and the planner itself. You need to know the depth of each dive so you can determine the maximum time allowed, or you must limit your depth to a specific planned maximum depth.