What is defined as an area, excluding sea areas A1 and A2, within the coverage of an Inmarsat geostationary satellite in which continuous alerting is available?

Correct Answer: Option C — Sea Area A3

Sea Area A3 is defined by IMO as the region within the coverage of Inmarsat geostationary satellites, excluding A1 and A2. This area provides continuous satellite-based distress alerting. Vessels operating here must maintain GMDSS equipment capable of satellite communication to ensure global coverage beyond terrestrial VHF and MF range.