What are the directional characteristics of the Inmarsat-C SES antenna?

Correct Answer: Option B — Omni-directional.

Inmarsat-C terminals utilize low-gain, omni-directional antennas. Unlike high-gain parabolic antennas that require complex mechanical stabilization to track satellites, the Inmarsat-C antenna radiates and receives signals in a broad pattern, allowing it to maintain connectivity without needing to physically point at the satellite, which is essential for GMDSS reliability.