What is the duration of the air breaks during in-water D?

The correct answer indicates that the duration of the air breaks during in-water D is established based on the amount of time spent on oxygen (O2). Specifically, after 30 minutes of oxygen exposure, a 5-minute air break is implemented before proceeding further.

This protocol is critical for maintaining safety during extended periods of oxygen use when conducting undersea rescue operations. The air breaks are necessary to prevent oxygen toxicity and to ensure proper decompression, allowing the body to adjust and manage the levels of inert gases that might have dissolved in tissues during the O2 exposure.

The connection between oxygen exposure duration and the length of the air break is a crucial safety rule that helps mitigate risks associated with high-pressure diving. By taking air at prescribed intervals, divers can also ensure that they remain within safe operational parameters, thus reducing the likelihood of complications during extended underwater activities.