Inmarsat plc is a United Kingdom-based provider of global mobile satellite communications services. On land, at sea and in the air, the Company serves government, commercial and NGO customers, providing broadband data and voice connectivity services. Through the Company's satellites, users can send data or make voice calls, while outside the coverage of any terrestrial network. It has five operating segments. The Company's Maritime segment focuses on commercial maritime services. The Enterprise segment focuses on energy, industry, media, carriers, and M2M services. The Aviation segment focuses on commercial aviation services. The US Government segment focuses on the United States civil and military government services. The Global Government segment focuses on civil and military government services. These segments are supported by Central Services, which includes satellite operations and backbone infrastructure, corporate administrative costs.