07/2020—Closure of the Inmarsat Fleet 77 service

This marine notice informs vessel owners, operators and masters of the closure of the Inmarsat Global Limited (Inmarsat) Fleet 77 on 1 December 2020.


The Inmarsat Fleet 77 service, which supports Inmarsat Fleet 77 ship earth stations, offers voice, data and mobile packet data services (MPDS) using the Inmarsat satellite communication network.

Inmarsat Fleet 77 meets the distress and safety specifications of the Global Maritime Distress and Safety System for voice communication. 

Inmarsat Fleet 77 is not a mandatory carriage requirement under the International Convention for the Safety of Life at Sea 1974 (SOLAS).


The International Mobile Satellite Organization (IMSO) on behalf of Inmarsat, advised the International Maritime Organization (IMO) in 2015 of its intention to close the Inmarsat Fleet 77 service on 1 December 2020.

From 1 December 2020, all Inmarsat Fleet 77 ship earth stations will be unable to connect to an Inmarsat service and will be deactivated.

How will the closure affect you? 

The closure of the Inmarsat Fleet 77 service only affects operation of Inmarsat Fleet 77 ship earth stations. 

Vessel owners, operators and masters are encouraged to contact their satellite communication distribution partner for options to replace Inmarsat Fleet 77 services.

For more information, visit the Inmarsat website

Sachi Wimmer 
Deputy Chief Executive Officer 
4 August 2020 
Australian Maritime Safety Authority 
GPO Box 2181 CANBERRA ACT 2601 

Last updated: 

Wednesday 1 February 2023