In what situation can a SCUBA diver omit decompression?

In the context of SCUBA diving, decompression refers to the slow ascent to the surface that allows nitrogen absorbed in the body to be safely released. In a scenario where a diver experiences a dive emergency that leads to an uncontrolled ascent, the primary concern becomes immediate safety rather than adhering to decompression protocols. This situation can occur due to factors such as equipment failure, medical emergencies, or environmental dangers that necessitate a rapid ascent despite the risk of decompression sickness.

When an uncontrolled ascent occurs, the diver may not have the opportunity to manage their ascent rate or perform necessary safety stops, and the urgency to reach the surface takes precedence. While this is certainly not ideal and poses significant risks, the necessity of immediate escape from a life-threatening situation justifies omitting decompression procedures.

In contrast, planned dives with a buddy, ascending slowly, and reaching the surface all suggest scenarios in which decompression protocols should be followed to ensure the diver's safety and prevent the dangerous effects of nitrogen bubbles forming in the body.