Inmarsat Appoints Frank Coles as Senior Director - Maritime Services for Global Xpress(TM)

Respected Maritime Expert Joins New Team

LONDON, February 25, 2011 - Inmarsat (LSE:ISAT), the leading provider of global mobile satellite
communications services, today announced that Frank Coles has been appointed
Senior Director - Maritime Services for Inmarsat's Global Xpress programme.

With 34 years in the maritime industry, Frank J. Coles has been able to
apply a wealth of knowledge and give the mariner and ship owner exactly what
they need to do their job and run their business. Coles was formerly the CEO
and President of Globe Wireless, leading the development of the innovative
Globe iFusion solution, launched in 2010.

Comments Leo Mondale, Managing Director, Global Xpress: "We welcome Frank
Coles to Global Xpress. His immense breadth of maritime knowledge is much
respected within the industry. He has a reputation for innovating and for
competitive product development."

Coles is a Master Mariner, with a Master's Degree in Maritime Law from
University of Wales, Cardiff, and he served 12 years as a deck officer at
sea. This was followed by 5 years as a lawyer at Richards Butler (London) and
Stephenson Harwood & Lo (Hong Kong).

Previous experience also includes General Manager with Pacific Basin Bulk
Shipping.

About Inmarsat

Inmarsat plc (LSE: ISAT) is the leading provider of global mobile
satellite communications services. Since 1979, Inmarsat has been providing
reliable voice and high-speed data communications to governments, enterprises
and other organizations, with a range of services that can be used on land,
at sea or in the air. The company's services are delivered through a global
network of more than 400 distribution partners and service providers
operating in 100 countries. For the year ended 31 December 2009, Inmarsat plc
had total revenue of US$1,038.1 million (2008: US$996.7 million) with an
EBITDA of US$594.2 million (2008: US$531.2 million). For more information,
please visit www.inmarsat.com.

For further information, please contact: Chris McLaughlin, Vice President, External Affairs: +44-779-627-6033