As Inmarsat was founded as a maritime communications operator, our first wholly-owned constellations – the Inmarsat-2 (I-2) and Inmarsat-3 (I-3) series – were positioned above the world’s sea-lanes to form four ocean regions:
The I-2 satellites were decommissioned in 2013 and 2014 after more than doubling their expected lifespan of 10 years.
Four of the five I-3 satellites remain in service.
Following the full deployment of the Inmarsat-4 (I-4) satellite constellation in 2009, a further three satellite regions were created over the Earth’s major landmasses.
Alphasat was launched in 2013 to supplement the I-4 network, at 24.9° East.
The Inmarsat-5 (I-5) satellites power our high-speed Global Xpress broadband service. Launched between 2013-2015, the constellation of three satellites covers the following regions:
I-5 F4 was launched on 15 May 2017 to provide additional capacity and resilience to our Global Xpress network.