Which signal indicates a need to deploy a radio according to the signs used by a Rescue Swimmer (RS)?

The correct indication that signals the need to deploy a radio, according to the signs used by a Rescue Swimmer, is when a hand is held to the ear. This gesture universally communicates the action of needing to use communication equipment, such as a radio. In rescue operations, effective communication is critical; therefore, signaling for radio deployment ensures that the rescue team can coordinate effectively and maintain situational awareness.

This gesture is easily recognizable and straightforward, allowing for quick understanding in potentially chaotic environments where clarity is essential. Other signals, such as a clenched fist with an arm pumping motion or arms crossed overhead, may convey different messages that do not specifically denote the need for radio communication. Similarly, a vigorous waving of one arm typically indicates a distress signal or a request for attention rather than the specific instruction to deploy a radio. This strengthens the importance of knowing and correctly interpreting these signals in rescue and emergency situations.