Which hazard is particularly concerning when diving in limited visibility or at night?

When diving in limited visibility or at night, vertigo is a particularly concerning hazard. This phenomenon often arises from confusion about orientation and depth perception, which can be severely compromised in low-light or murky conditions. Divers may find it challenging to maintain spatial awareness, leading to disorientation and increased risk of becoming lost or panicked underwater.

In such situations, the normal visual references that help divers understand their position and depth are obscured, making it easy to experience a sense of spinning or dizziness, which is characteristic of vertigo. It emphasizes the importance of good buddy communication, using lights effectively, and maintaining a level of calm to manage the potential for disorientation.

While other options like hypothermia, decompression sickness, and exhaustion can be concerns in various diving conditions, they are not specifically exacerbated by the conditions of limited visibility or nighttime diving in the same way that vertigo is.