Which statement is correct regarding a method that a vessel experiencing problems with shadowing of the Inmarsat-B SES antenna by an on-board obstruction could use to attempt reliable communications?

Correct Answer: Option A — Change course to make the communications.

Inmarsat-B SES antennas require a clear line-of-sight to the satellite. Physical obstructions like masts or cranes cause signal shadowing. Changing the vessel's heading is the only operational method to clear the obstruction and restore the link, as signal attenuation from obstacles cannot be corrected by software or mode switching.