When might surface decompression not be feasible?

Surface decompression may not be feasible if a recompression chamber is unavailable because surface decompression relies on the presence of a specific environment that allows for controlled pressure adjustments necessary to facilitate safe decompression. If a diver experiences symptoms of decompression sickness after surfacing, a recompression chamber is essential for administering the required treatment, which often involves returning the diver to a higher pressure environment to aid in the effective removal of inert gases from the body. Without a recompression chamber, divers have no safe means to undergo the necessary therapeutic procedures to mitigate the effects of decompression sickness, making surface decompression an impractical and potentially dangerous choice in such scenarios.

Recreational dives, scheduled training exercises, and situations without decompression obligations typically do not inherently pose situations where surface decompression is considered unfeasible, as they do not directly relate to the availability of necessary medical facilities and interventions.