🔍 Key Concepts
• Inmarsat-C priority levels (Distress, Urgency, Safety, Routine) and how they are selected when transmitting
• Difference between EGC (Enhanced Group Call) reception and individual or broadcast messages you originate from your own terminal
• Use of special address or service codes in satellite systems to route messages by type/priority
đź’ Think About
• Which of these options talks about something you, as the operator, actively do on the terminal to mark or route a message as Urgency or Safety?
• Does putting “PAN PAN” or “SECURITE” in plain text automatically change a message’s priority in the Inmarsat network, or is there a more formal method controlled by the terminal/software?
• Think about how EGC (Enhanced Group Call) works: does it relate to messages you send, messages you receive, or both?
âś… Before You Answer
• Verify how EGC Urgency/Safety messages are normally handled: are they transmitted by ships, by shore authorities, or both?
• Check whether Inmarsat-C terminals have coded service numbers or special 2‑digit identifiers for different services (e.g., SafetyNET, Routine telex, etc.).
• Confirm whether simply typing distress/urgency words into the text body actually sets the priority flag in the GMDSS/Inmarsat system, or if the terminal needs a specific service code or menu selection.