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A flat hand drawn across the throat.
Also known as: No air sign diving, Cut throat signal underwater
The diving hand signal meaning that a diver cannot breathe from their own supply.
Means that a diver cannot breathe from their own air supply.
Contexts: Public information
Is the most urgent signal in the set and is made large and unambiguous for that reason, since it must be read instantly and at a distance.
Contexts: Public information
A flat open hand drawn horizontally across the throat in one straight stroke.
A fuller structured visual breakdown is not yet documented for this symbol.