Inmarsat D

Inmarsat plc (LSE: ISAT) is a British satellite telecommunications company, offering global mobile services. It provides telephone and data services to users worldwide, via portable or mobile terminals which communicate to ground stations through eleven geostationary telecommunications satellites. Inmarsat's network provides communications services to a range of governments, aid agencies, media outlets and businesses with a need to communicate in remote regions or where there is no reliable terrestrial network. ... Inmarsat D/D+/IsatM2M: Inmarsat's version of a pager, although much larger than terrestrial versions. Some units are equipped with GPS. The original Inmarsat-D terminals were one-way (to mobile) pagers. The newer Inmarsat-D+ terminals are the equivalent of a two-way pager. The main use of this technology nowadays is in tracking trucks and buoys and SCADA applications. SkyWave Mobile Communications is a provider of D/D+/IsatM2M satellite data services with its DMR and SureLinx series products. SkyWave also provides satellite tracking, monitoring and control capabilities through its GlobalWave MT series products. Competing systems such as from Skybitz only operate on the MSAT geostationary satellite over North America. [Inmarsat. Wikipedia]