Final answer:
The maximum oxygen percentage allowed in a decompression chamber is not stated in the information provided. Decompression chambers are used to treat DCS by providing hyperbaric oxygen therapy at controlled levels to affected divers.
Step-by-step explanation:
The maximum allowed oxygen (O₂) percentage in a decompression chamber, also known as a recompression chamber, is not explicitly stated in the information provided. Decompression chambers are critical in providing hyperbaric oxygen therapy for divers experiencing decompression sickness (DCS), commonly known as "the bends". This condition occurs when divers ascend too rapidly, causing gases to come out of solution and form bubbles in the bloodstream with potential severe health consequences.
To prevent DCS, divers must ascend slowly or make decompression stops. If DCS does occur, treatment in a decompression chamber is vital. While the specific O₂ percentage is not available here, it is crucial to carefully control gas mixtures to avoid hypoxia or oxygen toxicity.