How is the sea area A3 defined by IMO?
A. Within the coverage of INMARSAT satellites, it’s an area approximately between 70 degrees North and 70 degrees South, excluding areas A1 and A2.
B. Within the coverage area of INMARSAT satellites.
C. Within range of shore-based MF coast station with DSC function.
D. Area above 70 degrees N and area below 70° S.