Inmarsat Fleet 77 offers voice and the choice of mobile ISDN up to 64kbps for cost-effective, global communications, outside of the Polar Regions.
Fleet 77 also meets the distress and safety specifications of the Global Maritime Distress and Safety System (GMDSS) for voice communication. Through four-stage voice pre-emption and prioritization, the service supports the accreditation of ships’ systems and ensures high priority distress and safety needs are met.
Distress voice calls made on Fleet 77 are routed through a Land Earth Station (LES) to a Maritime Rescue Co-ordination Centre (MRCC).
COMSAT owns and operates teleports today under LES Access Code 001 for Fleet 77 services.
Inmarsat is closing the F-33 and F-55 services at end-Q1, 2018. The planned date for closure is Wednesday, 11th April at 09:00 UTC. The service closures will be carried out as follows:
At a later date, ESAS housekeeping files will be generated to permanently remove all F-55 and F-33 terminals from the network. LESOs will be notified prior to the start of this activity.
A reminder of the F-55 and F-33 closure will be sent by email 48 hours prior to the start of the closure.
This notification provides a final reminder of the imminent global closure of services, and the regional closure of the Mobile Packet Data Service (MPDS) in the Inmarsat-3 (I-3) Atlantic Ocean Region West (AORW).
MPDS will remain available globally until 31 March 2018, at which point we will commence the service closure in the AORW region. Following this, MPDS will continue to be supported on Fleet 77 (and Swift 64), in all other I-3 ocean regions, on reasonable effort basis, and will be closed in stages as shown in the EOL (End-of-Life) schedule below. No MPDS will be available beyond 2018.
The EOL date for the Fleet 77 service remains unchanged as 01 December 2020 as per our last communication in December 2017.