A vessel with an 18-hour ETA to the Panama Canal on a voyage from Miami loses the ability to communicate via Inmarsat-C. The most likely cause is?
• Inmarsat ocean regions (AOR-W, AOR-E, POR, IOR) and which one covers the Western Atlantic/Caribbean/Panama area • The difference between satellite coverage limitations and shore earth station (LES) location • What an equipment fault would look like compared to sailing out of a satellite’s footprint
• On a voyage from Miami toward Panama, which Inmarsat ocean region are you in for almost the entire trip? Think about the Western Atlantic and Caribbean coverage map. • Does Inmarsat-C coverage depend mainly on a specific land earth station location (like Southbury) or on the satellite’s ocean region footprint? • If you were still inside the proper satellite coverage area, what kind of problem would most likely explain a total loss of communication ability?
• Verify which Inmarsat ocean region serves Miami–Caribbean–Panama (AOR-W vs AOR-E). • Check whether Southbury LES is tied to a specific satellite region and if a ship near Panama would be outside that satellite’s footprint. • Confirm whether normal Inmarsat-C operation would continue within coverage unless there is an onboard equipment or antenna fault.
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