What type of messages does a "Securite" call deliver?

A "Securite" call is used to communicate important information related to navigation safety and meteorological conditions. This type of message is crucial for ensuring the safety of vessels by alerting them to potential hazards, weather advisories, and other relevant navigational information that could affect their operations.

These calls are essential for maintaining maritime safety and preventing accidents at sea, especially in areas with heavy traffic or challenging environmental conditions. It is part of a broader system of maritime communication designed to keep all vessels informed and prepared for any potential dangers while navigating.

In contrast, the other types of messages do not align with the function of a "Securite" call. Crew changes and personal greetings are not of immediate concern for vessel safety and do not require a standard communication method like "Securite." Distress signals serve a different purpose, specifically alerting others to emergencies requiring immediate assistance.