What does the hand code 'fist' indicate?

The hand code 'fist' is universally recognized among lifeguards as a signal indicating that assistance is needed. When a lifeguard raises a fist, it serves as a clear visual cue to others that a situation requires immediate attention and possibly intervention. This code helps to quickly communicate the need for help, particularly in busy or chaotic environments such as swimming pools or beaches, where verbal communication may not be possible due to distance or noise.

In contrast, other options like 'all clear' might imply safety and no immediate concerns, 'stop dispatch' would indicate to halt any ongoing activities or procedures, and 'watch my zone' suggests a need for an increased level of vigilance in a specific area without directly indicating a crisis. Thus, the hand code 'fist' is specifically designed for the critical scenario of needing assistance, distinguishing it from these other signals.