How can a diver signal distress underwater?

To signal distress underwater, a diver typically employs various emergency signals, which include actions like waving their arms and using a dive light to attract attention. This approach is effective because it communicates urgency and the need for assistance to nearby divers or surface support.

Using arm movements, particularly large and exaggerated ones, can catch the eye of other divers. The use of a dive light is also critical, especially in low visibility conditions or during night dives. Flashing the dive light can create noticeable signals that can be spotted even from a distance, enhancing the chances of being noticed and helped.

The other options do not effectively convey a distress signal. Simply ascending to the surface without signaling may overlook the crucial aspect of alerting others to the situation, while remaining silent and waiting for help leaves other divers unaware of any issues. Relying solely on hand gestures narrows the range of communication methods, limiting the diver's effectiveness in signalling their distress compared to the combined use of visual signals and dive light.