In what way(s) may a Distress message be initiated through Inmarsat?

Correct Answer: Option C — By pressing dedicated key(s) for this purpose or using menu-driven features to produce a Distress priority message.

Inmarsat-C equipment is designed with dedicated Distress functionality, typically involving a physical button or a specific menu-driven sequence. This ensures that Distress alerts are formatted correctly with the required priority and vessel identification, which is critical for the automated processing by the Land Earth Station and subsequent rescue coordination.