Networks: Inmarsat:  A

Inmarsat-A, introduced in 1982, was the first system.  It is based on FM modulated analog technology using very large antennas of a size and weight making them suitable only for large ships such as cruise liners, oil tankers and large trading vessels. Voice, fax and data services are available for this system, including

Inmarsat A

multiple channel operation  and switched data up to 64Kbit/s. However the Inmarsat A system, has been made more or less obsolete by the newer digital modulated systems. While Inmarsat will continue to support the existing “A” systems as long as there is a requirement and demand, they will no longer approve new systems for manufacture.

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