When does an incoming EGC alarm sound on an Inmarsat-C system?

An incoming EGC alarm on an Inmarsat-C system sounds to draw the operator's attention to an unscheduled Distress or Urgency message. This is crucial for safety at sea, as Distress and Urgency communications carry high priority and can indicate potential emergencies requiring immediate action. The system is designed to ensure that operators do not overlook these critical communications.

The alarm functions as an alert mechanism, prompting the operator to take necessary steps in response to these urgent messages. The ability to quickly respond to Distress situations can be life-saving, underscoring the importance of the alarm system in maritime communication.

Inmarsat-C systems utilize these alarms effectively to maintain safety and manage emergencies at sea, reinforcing the significance of monitoring and reacting to alerts promptly.