PADI Divemaster Certification Practice Exam

What action should a diver take after exceeding the no stop limit by four minutes?

1. Continue the dive to the surface

2. Make a stop at 10 feet for 5 minutes

3. Make a stop at 15 feet for at least 8 minutes

4. Immediately ascend to the surface

The correct answer is: Make a stop at 15 feet for at least 8 minutes

When a diver exceeds the no-stop limit, it indicates that they have gone beyond the no-decompression limits set for their current dive profile. This situation necessitates a specific response to mitigate the risk of decompression sickness, also known as "the bends." Making a stop at a depth of 15 feet for a duration of at least 8 minutes provides a safety measure that allows the body to off-gas excess nitrogen that has accumulated during the dive. Ascending to the surface without taking the appropriate safety stop can increase the risk of nitrogen bubbles forming in the body due to rapid decompression, potentially leading to serious health issues. A safety stop at a shallower depth is typically recommended in such scenarios, and stopping at 15 feet for the specified time is acceptable and aligns with safe diving practices after exceeding no-stop limits. This approach allows for a controlled ascent while still ensuring adequate time for the body to decompress. This is why making a stop at 15 feet for at least 8 minutes is considered the correct action in such a situation.