What is one of the main purposes of distress signals?

The primary purpose of distress signals is to request immediate assistance in dangerous situations. When a vessel is in trouble or in a life-threatening scenario, it is crucial to alert others in the vicinity who may be able to provide help. Distress signals are universally recognized indicators that convey the urgency of a situation, ensuring that nearby vessels and rescue authorities respond promptly to assist those in need. This communication is vital for the safety of individuals on board and can significantly increase the chances of survival in emergencies.

Other choices do not fulfill this primary function of distress signals. Informing other vessels about routine operations or communicating safety compliance does not imply an urgent need for help. Similarly, signaling the end of a fishing expedition is unrelated to emergency situations and does not pertain to requesting assistance, which is the essence of a distress signal.