What is the hand signal for "Gas Switch"?

The hand signal for "Gas Switch" is represented by forming a horizontal "V" with the fingers in front of your regulator and then rotating the fingers. This gesture effectively communicates to your dive buddy that you are about to switch from one gas supply to another, which is crucial in technical diving scenarios where specific gas mixtures are used at different phases of a dive.

Using this signal helps ensure safety and clear communication underwater, especially when verbal communication is not possible. It alerts your buddy to be prepared for the switch in gas, allowing them to respond appropriately, whether it’s checking their own gas supply or preparing for a deeper dive phase. This is particularly important in situations where divers manage multiple gas supplies, as a smooth transition can impact safety and dive execution.

Other signals that may involve raising a hand or making circular motions can have different meanings altogether, which could lead to confusion during a dive, making the precise signal of forming a "V" and rotating it essential for effective communication.