Psychological fitness
The underwater world is a hostile environment to humans, requiring the use of advanced life-support equipment to survive in it. Diving – whether for work or pleasure – is therefore a safety-critical activity, where optimal human performance is necessary to successfully manage risks to divers’ health and safety.

There are many psychological factors that can contribute to an increased risk for adverse events in diving, and one can probably compile a very long list of such potential risk factors. However, just having a long list may not necessarily be very helpful when determining an individual person’s psychological-competency-to-dive (PCtD). This document sets out from the premise that divers need a level of psychological competency in order to dive safely, and therefore proposes a psychologically informed framework to guide efforts to determine an individual’s PCtD.