PADI Divemaster Certification Practice Exam

When comparing dive computers to dive tables, which statement is true?

1. Dive tables require more calculations.

2. Dive computers do not require maintenance.

3. Dive tables offer more up-to-date decompression data.

4. Dive computers limit dive time more than tables.

The correct answer is: Dive tables require more calculations.

When considering dive computers as opposed to dive tables, it's important to recognize the nature of how each system operates. Dive tables are essentially static tools that provide predetermined no-decompression limits and repetitive dive times based on a variety of factors, including depth and time. To use dive tables effectively, a diver must perform several calculations to determine the allowable limits for consecutive dives, factoring in surface intervals and other variables. This can involve referencing multiple charts or performing mathematical computations to ensure safety during the dive. On the other hand, dive computers automatically calculate real-time data during a dive, taking into account factors such as ambient pressure, dive depth, and time, which significantly reduces the need for manual calculations. They continuously update as conditions change, providing the diver with immediate feedback and information. While dive computers are sophisticated and require some degree of maintenance, they do not require the same level of manual calculation and consideration that dive tables necessitate. Therefore, the assertion about dive tables requiring more calculations is accurate, as it highlights the comparative simplicity and real-time adjustments provided by dive computers.