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How to Convey Messages Underwater

One of the most captivating aspects of the underwater realm lies in its tranquil silence. Yet, the absence of spoken words necessitates an alternative mode of communication: the use of hand signals. Divers employ a universally understood set of signals to convey crucial messages, with some of the most essential ones being:

OK: Form a circle using your thumb and first finger when in close proximity or touch the top of your head with one arm when at a distance. This signal can serve both as a query and a response.
Descend: Signal a thumbs-down gesture.
Ascend: Signal a thumbs-up gesture.
Stop: Hold one hand in front of you, palm facing outward.