🔍 Key Concepts

• GMDSS Inmarsat-C distress alert procedure and what the manuals say about cancelling a false alert • The role of the Land Earth Station (LES) and Rescue Coordination Center (RCC) in handling Inmarsat-C distress alerts • Requirement to clearly identify a false or inadvertent distress and send a proper cancellation message

💭 Think About

• Think about what information has already been sent in the original distress alert and who received it. What is the safest and quickest way to reach the same authorities to say it was false? • Compare the options that involve sending a new, clear message versus those that either do nothing or send another distress-type transmission. • Ask yourself which menu or function you would realistically use on an Inmarsat-C terminal to compose and transmit a normal or special-purpose message to shore.

✅ Before You Answer

• Identify which option involves using the same LES (Land Earth Station) that handled the original distress alert. • Check which option results in an explicit cancellation message being transmitted, not just pressing keys on the terminal locally. • Eliminate any option that tells you to wait and do nothing or to initiate a second distress alert instead of a cancellation.