A vessel loses Inmarsat-B SES operation after a large course change. Which of the following could cause this?

Correct Answer: Option A — System loses gyro follow-up or a gyro system malfunction.

Stabilized Inmarsat antennas rely on input from the ship's gyrocompass to maintain pointing accuracy toward the satellite during vessel maneuvers. If the gyro follow-up fails or the system malfunctions, the antenna will lose its orientation, causing the link to drop immediately following a course change.