GMDSS Sea Coverage Area A2 corresponds to what MF range?

GMDSS Sea Coverage Area A2 corresponds to what MF range?

• A. 20 to 100 miles offshore within the radiotelephone coverage of at least one MF station with continuous DSC alerting capabilities
• B. 0 to 20 miles offshore
• C. 100 to 200 miles offshore
• D. 10 to 50 miles offshore

Answer: (A)

GMDSS sea area A2 is defined by the MF radiotelephone coverage from at least one coast station that provides continuous DSC alerting. This zone normally extends farther offshore than VHF shore coverage but not as far as satellite-based reach, placing the MF A2 range at roughly 20 to 100 miles offshore. The continuous DSC alerting ensures automatic distress/urgency signaling when needed, which is a key feature of this area. So the range described as 20 to 100 miles offshore aligns with the MF coast-station coverage that characterizes A2. The other distance ranges correspond to nearer shore VHF coverage or to farther systems (like satellite coverage or HF), which are outside A2’s MF-only definition.

GMDSS sea area A2 is defined by the MF radiotelephone coverage from at least one coast station that provides continuous DSC alerting. This zone normally extends farther offshore than VHF shore coverage but not as far as satellite-based reach, placing the MF A2 range at roughly 20 to 100 miles offshore. The continuous DSC alerting ensures automatic distress/urgency signaling when needed, which is a key feature of this area.

So the range described as 20 to 100 miles offshore aligns with the MF coast-station coverage that characterizes A2. The other distance ranges correspond to nearer shore VHF coverage or to farther systems (like satellite coverage or HF), which are outside A2’s MF-only definition.