What is an effective way to signal for help during a distress situation on a vessel?

Using visual signals, such as flares or flags, is an effective way to signal for help during a distress situation on a vessel because these methods can be seen from a distance and are recognized internationally as distress signals. Flares, in particular, can indicate both position and urgency, creating a visible signal that can attract the attention of nearby vessels or aircraft. Flags can also convey a message of distress, as certain combinations and positions of flags are standardized for communication at sea.

In contrast, making noise with engines may not effectively convey a distress signal to others, as it is generally not a recognized method of signaling for help. Turning off all lights to conserve power would severely limit visibility and the ability to be seen by potential rescuers. Relying solely on verbal calls for help, while important, may not be effective if there is no one nearby to hear. Therefore, visual signals provide a clear and compelling method to communicate distress in the maritime environment.