Beams cover oceans and major landmasses

As Inmarsat was founded as a maritime communications operator, our first wholly-owned constellations – the Inmarsat-2 and Inmarsat-3 series – were positioned above the world’s sea-lanes to form four ocean regions:

  • Atlantic Ocean Region West (AOR-W), at 54 degrees West
  • Atlantic Ocean Region East (AOR-E), at 15.5 degrees West
  • Indian Ocean Region (IOR), at 64 degrees East
  • Pacific Ocean Region (POR), at 178 degrees East

The Inmarsat-2 satellites were decommissioned in 2013 and 2014 after more than doubling their expected lifespan of 10 years.

I-3 satellite coverage map


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. They are:

  • I-4 Americas, at 98 degrees West
  • I-4 EMEA (Europe, Middle East and Africa), at 25 degrees East
  • I-4 Asia-Pacific, at 143.5 degrees East.

Alphasat and I-4 Coverage Map (March 2015)

We have lift-off!

I-5 F3 launched

  DAYS       HRS        MIN        SEC

Inmarsat-5 F3 launched
from Baikonur Cosmodrome
at 12:44 BST today
Find out more»