If a vessel is engaged in local trade and at no point in its voyage travels outside of the range of a VHF shore station with continuous DSC alerting then the vessel is operating in what area?

Correct Answer: Option D — Sea area A1

Sea Area A1 is defined as the area within the coverage range of at least one VHF coast station in which continuous DSC alerting is available. This is typically within 20 to 30 nautical miles of the coast, providing essential safety communication for vessels engaged in local or coastal trade.