Scuba divers use dive logs to record the details of each dive. There are no hard and fast requirements or rules pertaining to recreational dive logs, but commercial divers and instructors may need to keep a log in accordance with government regulations. Whether you use the printed logs sold in dive shops that have spaces for each item, a computer or computerized dive planner, or a spiral notebook, you should keep a written record of the physical details of each dive that you make.
Your dive log should have some basics, including your name and address. Use the log to keep up with your diving characteristics, such as how much weight you require to maintain neutral buoyancy. Record the physical details of each dive, including date and time that you entered the water, the time that you returned to the surface, the maximum depth that you reached, bottom time, and how long you spent decompressing. Record the amount of air you had when you entered and exited the water, and your surface intervals between multiple dives on the same day. If you have medical problems within 24 hours of a dive, give your dive log to medical personnel as soon as possible. Take careful notes about any evidence of decompression sickness, also known as the bends.
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