Hand flat, fingers together, palm out, thumb down then hand rocking back and forth on axis of forearm.
This is the opposite of Okay. The signal does not indicate an emergency.
I AM OKAY or ARE YOU OKAY?
Thumb and forefinger making a circle with three remaining fingers extended (if possible).
Divers wearing mittens may not be able to extend three remaining fingers distinctly. Short range use.
OKAY ON THE SURFACE (CLOSE)
Right hand raised overhead giving Okay signal with fingers.
OKAY ON THE SURFACE (DISTANT)
Both hands touching overhead with both arms bent at 45° angle.
Given when diver is close to pickup boat.
Given when diver is at a distance from the pickup boat.
DISTRESS or HELP or PICK ME UP
Hand waving overhead (diver may also thrash hand in water).
Indicates immediate aid is required.
WHAT TIME? or WHAT DEPTH?
Diver points to either watch or depth gauge.
When indicating time, this signal is commonly used for bottom time remaining.
GO DOWN or GOING DOWN
Two fingers up, two fingers and thumb against palm.
GO UP or GOING UP
Four fingers pointing up, thumb against palm.
Hand slashing or chopping at throat.
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