How should divers communicate when exploring a wreck?

When exploring a wreck, divers should use hand signals and have a predetermined communication plan because underwater environments present unique challenges such as limited visibility and sound transmission. Verbal commands are often ineffective due to sound absorption in water and the potential for noise from equipment or other divers. Having a set of hand signals ensures that divers can communicate clearly and efficiently without relying on verbal communication.

A predetermined communication plan is crucial for coordinating actions, especially in potentially dangerous situations, such as navigating a wreck where hazards may be present. This plan enables divers to share important information quickly, like identifying points of interest or signaling for ascent or descent. Using standardized hand signals minimizes confusion and enhances safety when visibility is compromised.

Relying solely on underwater radios can lead to complications due to battery life, interference, and device malfunction. Additionally, communication through touch might not be practical for conveying critical messages quickly or effectively in potentially dynamic wreck environments. Thus, the combination of hand signals and a communication plan is the most reliable method for ensuring safety and coordination among divers when exploring wrecks.