What is Global Maritime Distress and Safety System or GMDSS and its details?

August 7, 2016

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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)

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Amit Sharma

Graduated from M.E.R.I. Mumbai (Mumbai University), After a brief sailing founded this website with the idea to bring the maritime education online which must be free and available for all at all times and to find basic solutions that are of extreme importance to a seafarer by our innovative ideas.

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1 Comment

Prasun Kumar Das says:

July 11, 2019 at 11:42 am

Man Overboard is a distress situation. Even the RT message will be Distress message . Information given that RT message will be Urgency is absolutely wrong. Students following this in GOC examination will fail. Request you to correct this. You may consult ITU manual for maritime mobile & maritime mobile satellite services.
Thanking you

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