Which action is NOT part of signaling for distress?

Changing the vessel's course is not considered a part of signaling for distress. Instead, signaling for distress typically involves clearly indicating trouble and the need for assistance using established methods. Standard distress signals, attempts to communicate via radio, and visual or sound signals are all recognized practices that convey an urgent need for help.

Standard distress signals are universally understood methods, such as raising a flag, using flares, or generating noise. These signals are designed to attract attention and inform nearby vessels or rescuers of a situation requiring immediate assistance. Attempting to communicate via radio is also a vital action, as it allows the distressed vessel to convey specific information about its situation or location, often enabling a quicker response. Visual or sound signals, such as using a whistle or illuminating a lighthouse, further enhance the ability to alert others in the vicinity.

In contrast, simply changing a vessel's course does not effectively communicate distress, nor does it necessarily increase the chances of being noticed by potential rescuers. While altering a course may be a strategic move during an emergency, it does not serve as a clear signal of distress on its own.