Who is Inmarsat?
Inmarsat is a mobile Satellite Communications (Satcom) company that provides global connectivity services for maritime, aviation, government, and enterprise customers.
- Global mobile satellite connectivity services for land, sea, and air users.
- Maritime Satcom for vessel operations, crew welfare, and safety services.
- Aviation connectivity for cockpit communications, safety services, and passenger broadband.
- Government and enterprise satellite services for mission-critical, remote, and mobile operations.
- Managed network services and application enablement across L-band and other satellite spectrum bands.
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More About Inmarsat
Inmarsat provides Satcom services used by enterprises, transport operators, and public-sector institutions that require connectivity beyond the reach of terrestrial networks. Its portfolio centers on mobile satellite services (MSS) delivered via a fleet of geostationary satellites, with coverage designed for maritime, aviation, land mobility, and fixed remote sites. Enterprise technical stakeholders typically treat Inmarsat as a Network Service Provider (NSP) within wide-area networking and critical communications architectures, especially where continuous availability and global reach are required.
In maritime environments, Inmarsat delivers satellite connectivity (networking) for merchant shipping, offshore energy platforms, fishing fleets, and other vessels. Services cover core IP data connectivity, voice, and safety-related communications used for navigation updates, regulatory reporting, condition monitoring, and crew access. These services are commonly integrated with shipboard LANs, Operational technology (OT) networks, and fleet management platforms through standard IP routing, VPNs, and Quality of Service (QoS) policies configured by enterprise network teams.
In aviation, Inmarsat provides satellite-based services (aviation connectivity) for cockpit and cabin connectivity on commercial, business, and government aircraft. Cockpit services support safety communications and air traffic management use cases, while passenger connectivity enables broadband in the cabin. Integration typically relies on airborne satellite terminals, onboard networking systems, and airline IT infrastructure, with traffic backhauled into enterprise networks and cloud environments through secure gateways and standard IP and security protocols.
For governments, public safety agencies, and enterprises operating in remote or mobile contexts, Inmarsat offers Satcom (mission-critical networking) that support command-and-control, field operations, and data collection. Terminals can be vehicle-mounted, portable, or fixed at remote sites, and interfaces usually expose Ethernet and IP connectivity. Traffic is often integrated with VPNs, encryption appliances, and identity-aware access controls managed by the customer, aligning with agency or corporate security frameworks.
From a technology perspective, Inmarsat services are based on geostationary satellites and ground infrastructure that deliver L-band and other-band connectivity, with terminals using standardized AIR interfaces and IP-based service layers. Customers commonly employ standard enterprise networking protocols, including Transmission Control Protocol/Internet Protocol (TCP/IP), MPLS-based backhaul in some architectures, and industry security frameworks such as IPsec tunnels. While terrestrial telecom providers and other satellite network operators may be considered in the same general category, Inmarsat is distinct in its focus on mobile Satcom and global coverage that extends across oceans and remote geographies.
In a directory or marketplace taxonomy, Inmarsat fits within categories such as satellite connectivity services, maritime communications, aviation connectivity, government and defense communications, and remote and mobile enterprise networking. Its offerings are typically evaluated alongside other Wide Area Network (WAN) and connectivity options during network design, particularly for use cases where terrestrial fiber, microwave, or cellular links are unavailable or do not satisfy coverage requirements.
Our description of Inmarsat. Updated December 2025.
