What is a common danger that can arise when a diver is fatigued?

When a diver is fatigued, the risk of diving accidents increases for several reasons. Fatigue can impair judgment, reduce reaction times, and affect physical coordination, all of which are critical for safe diving. A tired diver may make poor decisions under pressure, potentially leading to dangerous situations, such as exceeding safe ascent rates or forgetting important safety protocols. Moreover, fatigue can make it harder for divers to communicate effectively with their dive buddy or to recognize signs of trouble, which are fundamental components of diving safety.

In contrast, increased buoyancy is generally related to the diver's equipment and body position rather than fatigue. Accidental surfacing can occur for various reasons but is not specifically tied to fatigue; it could result from a lack of awareness or failure to monitor depth. Loss of orientation can happen if a diver is disoriented while underwater but doesn't directly correlate to fatigue in the same way as overall diving safety can be compromised. Thus, the link between fatigue and its potentially dangerous outcomes makes diving accidents the most relevant answer in this context.