Satellite systems operated by the Inmarsat, overseen by the International Mobile Satellite Organization (IMSO) are also important elements of the GMDSS.

International Mobile Satellite Organization (IMSO)

He headed U.S. delegations in the 95-nation International Mobile Satellite Organization (IMSO, known as Inmarsat prior to privatization of Inmarsat's commercial activities in 1999).

The name was changed to "International Mobile Satellite Organization" when it began to provide services to aircraft and portable users, but the acronym "Inmarsat" was kept.

Convention on the International Mobile Satellite Organization (IMSO)

The International Mobile Satellite Organization (Inmarsat) is the intergovernmental organization that oversees certain public satellite safety and security communication services provided via the Inmarsat satellites.

The Assembly of the IMSO decided to rename the organization to the International Mobile Satellite Organization (Inmarsat) in December 1994.

The IMSO was reestablished by the Convention on the International Mobile Satellite Organization signed at London on 24 April 1998 and succeeded INMARSAT on 15 April 1999.

C-Link relies on four communication satellites placed 22,000 miles in space by Inmarsat, a consortium of 75 nations known as the International Mobile Satellite Organization.