SDI Open Water Scuba Diver Practice Exam

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Prepare for the SDI Open Water Scuba Diver Exam. Study comprehensively with flashcards and multiple choice questions, detailed explanations aid understanding. Gear up for your certification!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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On most repetitive dives, your computer will provide:

More liberal no-decompression limits than on single dives.
Equal no-decompression limits as single dives.
More conservative no-decompression limits than on single dives.
Less no-decompression limits than training dives.

The correct answer is: More conservative no-decompression limits than on single dives.

When divers engage in repetitive dives, their bodies tend to accumulate inert gases, primarily nitrogen, from each exposure to underwater pressure. Because of this accumulation, dive computers adjust the no-decompression limits (NDLs) to be more conservative on subsequent dives. This adjustment is made to ensure that divers have a reduced risk of experiencing decompression sickness, which can occur if a diver ascends too quickly or does not allow enough time for nitrogen to safely leave the body. While a single dive may allow for a specific time limit before needing to perform a decompression stop, repetitive diving increases the likelihood that nitrogen saturation within body tissues will exceed safe levels. Therefore, dive computers will typically provide more conservative limits on repetitive dives as a precautionary measure. This is important for maintaining a safe diving practice and protecting diver health, underscoring the principle of safety over extended dive time. In contrast, the other options do not accurately reflect the physiological risks involved with repetitive dives or the operational principles of dive computers.