Which type of message indicates a situation requiring immediate assistance?

A distress message is used to indicate a situation that requires immediate assistance. This message signifies that a person, vessel, or aircraft is in grave and imminent danger and needs urgent help. The implications of a distress message are critical; it activates a response from nearby vessels or authorities to provide the necessary assistance.

In contrast, a safety message is intended to convey important information related to safety, such as navigational warnings or weather updates, but it does not imply that immediate assistance is required. An urgency message conveys a situation that is concerning but not life-threatening, prompting attention but not immediate action. An information message delivers general information and does not involve any request for assistance or urgent action.

Understanding the distinctions between these types of messages is crucial for effective communication in maritime operations and for ensuring safety at sea.