What does the term "decompression dive" refer to?

The term "decompression dive" refers to a dive requiring a planned ascent. This type of dive involves going deeper than a certain depth or for longer than a certain duration, which increases the risk of nitrogen absorption in a diver's tissues. To mitigate the risks of decompression sickness, divers must ascend in a controlled manner, often making planned stops at various depths to allow the excess nitrogen to safely exit the body.

Proper planning is essential for a decompression dive because it ensures that the diver adheres to specific ascent rates and safety stops, allowing for the gradual release of nitrogen. This careful management minimizes the risk of developing decompression sickness, also known as "the bends," which can occur if a diver ascends too quickly. On the other hand, the other options listed do not accurately describe the nature of a decompression dive.