A vessel, before transiting the Panama Canal, on a voyage from Hawaii to Florida, loses the ability to communicate via Inmarsat-C. The most likely cause is:
• Inmarsat geostationary satellite coverage areas (ocean regions): Atlantic Ocean Region East/West, Pacific, Indian • Difference between satellite coverage and Land Earth Station (LES) coverage • How vessel’s position (Hawaii → Panama Canal → Florida) relates to switching between ocean region satellites
• From Hawaii toward the Panama Canal, which Inmarsat ocean region are you moving out of, and which are you moving into? • Is the loss of Inmarsat-C service more likely caused by leaving a satellite’s footprint or by moving away from a specific shore station/LES? • Would the satellite’s orbit itself change with the ship’s movement, or does the ship simply move in and out of fixed coverage zones?
• Identify which Inmarsat ocean region covers Hawaii and which covers the Panama Canal/Caribbean/Florida area. • Distinguish between Land Earth Station (LES) coverage (a ground facility) and satellite footprint coverage (space segment). • Confirm that Inmarsat uses geostationary satellites and consider whether their orbit limits ship range, or the ship’s position within an ocean region does.
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