88

What are Sea Areas as per GMDSS ?

GMDSS divides the world’s oceans into four “sea areas”, designated A1 through A4.

AREA A1:-

An area within the radiotelephone coverage of at least one VHF coast station in continuous digital selective calling (DSC), alerting is available.

Area could extend up to 30-50 Nautical Miles.

AREA A2:-

An  area within the radiotelephone coverage of at least one MF coast station in which continuous DSC alerting is available.

Area could extend up to 200 nautical miles.

AREA  A3 :-

An area,  excluding area A1 and A2 within coverage of an Inmarsat geostationary satellite in which continuous alerting is available.

Range – Between latitude (76 degree N to 76 degree S)
IMO requirements for Range :(70 degree N to 70 degree S)

 AREA A4 :-

An area outside , Sea area A1, A2 and A3. This is essentially the polar region.

 AMIT KUMAR

Leave a Comment