How is a signal radiated from an Inmarsat-C system's antenna?
Official USCG Answer & Rule Citation
Correct Answer: Option C — It is radiated in an omni-directional pattern.
Inmarsat-C terminals utilize low-gain, omni-directional antennas. Unlike high-gain systems, these antennas do not require mechanical tracking or precise pointing at the satellite. This design allows for a compact, reliable installation suitable for smaller vessels and GMDSS safety applications where continuous, low-bandwidth data connectivity is the priority.
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