An important part of the learning process is dive planning, and it is associated with the “thinking diver.” You would not consider long-distance travel without considering how much fuel the car needs, how long it will take, and how much money you need. So why would you dive without planning? It does not take long once you know what you are doing, and it may save your life one day!
- Before each dive, you will consider the following:
- The no decompression limit (NDL) for the depth (maximum allowable dive time)
- The open circuit gas supply limit (minimum remaining air pressure at the end of a dive 50 bar/750 psi)
- Your personal exposure to the environment (hot or cold)
- To plan your dive, look at each of these items and base the dive plan on the most conservative time for any of the above. Remember:
- The maximum depth for certification in this course is 20 meters/66 feet.
- The maximum recreational diving limit is 40 meters/130 feet.
- After each dive, you will review the facts of the dive, such as your nitrogen tissue loading, the actual depth you reached, and the remaining gas you had upon reaching the surface. All this information will be used to plan the next dive.