What is the primary purpose of a distress signal?

The primary purpose of a distress signal is to indicate an emergency situation requiring assistance. When a vessel uses a distress signal, it conveys urgency and alerts other mariners or rescue services that immediate help is needed. This could involve a variety of emergencies, such as a vessel taking on water, an onboard medical emergency, or a vessel having lost power and drifting. The clarity of the distress signal is vital for swift rescue operations, as it ensures that the message is received and understood by those who can offer assistance.

In contrast, communicating navigation needs or requesting permission to dock does not imply an emergency and are related to operational or logistical aspects of maritime activities. Announcing arrival at a destination also does not signal a need for immediate assistance; instead, it pertains to a routine communication that does not reflect the urgency of a distress situation.