Which action must be taken to ensure that...

🔍 Key Concepts

• Inmarsat-C login procedure and why it matters for message reception • How GMDSS (Global Maritime Distress and Safety System) stores and forwards messages of different priority levels (distress, urgency, safety, routine) • The role of a Land Earth Station (LES) and whether you must interact with it before receiving traffic

💭 Think About

• Think about what must be established between your ship’s terminal and the satellite network before any shore-to-ship messages (of any priority) can reach you. • Consider whether simply powering the equipment is enough, or whether the system needs to be registered or identified in some way to the network. • Ask yourself if you need to manually obtain a message reference number (MRN) in order to start receiving all types of messages, or if that is related to something else (like individual messages or acknowledgements).

✅ Before You Answer

• Verify which step actually tells the Inmarsat-C network who and where you are so it can deliver messages to your terminal. • Check whether the official GMDSS guidance says that commissioning alone guarantees future reception, or if an operational log-in is still required. • Confirm if receiving an MRN from the LES is a prerequisite for all incoming traffic, or if MRNs are associated with specific messages or transactions.

Which action must be taken to ensure that incoming message traffic of all priority levels will be received through Inmarsat-C?

The GMDSS Radio Operator must log-in to the desired satellite (if the unit did not automatically do so.)

No additional action is necessary after turning on the receiver and aiming the antenna at the desired satellite.

The system needs only to be commissioned and turned on.

The GMDSS Radio Operator must log-in to the desired satellite and receive the message reference number (MRN) from the LES.

🔍 Key Concepts

💭 Think About

✅ Before You Answer