How should dive lights be turned off for communication purposes?

To communicate effectively in low visibility or during night dives, diving lights should be briefly switched off while maintaining visual contact with a buddy. This method allows both divers to see each other's signals and movements without the glare of the lights interfering with their visibility.

Switching off the light helps to minimize light pollution in the water, as bright lights can distort visibility and makes it harder for the other diver to see. By keeping visual contact, divers can exchange signals or gestures, ensuring clear understanding and maintaining safety during the dive.

Leaving the lights on during communication can hinder visibility and may prevent clear signaling, while a constant low beam may not provide the necessary contrast for effective communication. Switching off the light and swimming away would break the visual connection and could lead to confusion or separation, which is undesirable in diving scenarios.