A fleet of geostationary satellites parked over the equator. From the ground each one looks fixed in the sky, which gives big, stable spot-beams suited to higher-bandwidth voice and data. Coverage extends to about 76° north and south — everywhere except the poles.
Inmarsat is the network we reach for when the destination is known and the job needs real data: filing video from the field over BGAN, running a vessel on FleetBroadband, or keeping a base camp online. Because each satellite sits still in the sky, a pointed terminal holds a stable, higher-bandwidth link for hours.
The trade-off is geometry: the satellites sit over the equator, so the link needs a clear line of sight towards it, fades at very high latitudes and does not reach the poles. For routes that cross those limits we pair it with — or swap it for — Iridium.