79I2 D
 A vessel loses Inmarsat-B SES operation after a large course change. Which of the following could most likely cause this?
A. Shadowing of the SES antenna by clouds or other weather formations.
B. Misalignment of the shadow correction filter.
C. The vessel sailed beyond the footprint of the satellite coverage.
D. System loses gyro follow-up or a gyro system malfunction.
