When is there typically no need to communicate underwater?

Communication underwater is typically not needed when light is visible because visibility can aid divers in understanding their surroundings and signals from their dive buddies without the necessity for vocal communication. Good visibility allows divers to see gestures and light signals clearly, reducing misunderstandings and the need to elaborate verbally.

In situations where bubbles are present, or if two-way communication devices are being used, it may indicate that divers still need to engage in communication to convey specific information or concerns. Similarly, nearing the surface can create circumstances where divers may need to communicate important information regarding ascent rates or safety stops. Therefore, in conditions of clear visibility, divers can effectively rely on visual cues, making additional communication unnecessary.