SIRIUS SATELLITE RADIO SELECTS WSI CORP. FOR MARINE WEATHER DATA New Marine Weather Service Expected to Begin on SIRIUS Late This Year

03-15-2005

NEW YORK – March 15, 2005 – SIRIUS Satellite Radio (NASDAQ: SIRI) today announced that WSI Corp., a leading provider of premium weather services and precision forecasts, will provide SIRIUS with a full suite of marine weather content for a new service, which is expected to begin late this year.

SIRIUS plans to create a special marine weather service that will include a variety of graphical and text information, including water surface temperatures, lightning strikes, coast-to-coast U.S. and Canadian weather radar, storm tracking, winds and wave heights.

This new service will be the first premium SIRIUS data service, and pricing will be announced later this year.

“SIRIUS is already the ‘de facto' standard for satellite radio content in the boating industry, and we intend to extend this market position to include a wide array of marine specific services.” said Larry Pesce, Senior Vice President of SIRIUS Services. “Our goal is to offer the gold standard of marine services, beginning with this WSI agreement. WSI is known for its high quality, precision forecasts and offers the most comprehensive suite of market specific weather information services in the world. We're very excited about the value this service will bring to SIRIUS subscribers boating throughout North America, offshore waters and the Caribbean.”

SIRIUS will broadcast the marine weather data at the highest level of quality and data resolution. The result will be more detailed mapping of critical weather information. SIRIUS also plans to introduce a new data receiver for use in conjunction with this service.

“We view SIRIUS as the clear leader in satellite radio in the marine industry, and we're delighted that they have selected us to be their marine weather partner,” said Lynne Wilson, Executive Vice President of WSI. “Together we can provide a compelling weather information service for boaters across the U.S. and Canada.”

About WSI Corporation
WSI Corporation is the world's leading provider of weather-driven solutions for professionals in the media, aviation and energy markets, and also serves multiple federal and state government agencies. Today, WSI is the number one choice of the majority of the nation's broadcasters and major cable networks, hundreds of airlines throughout the world, professional pilots, energy traders, and utilities. WSI is headquartered in Andover, Massachusetts with offices in Birmingham, England, and is a wholly owned subsidiary of Landmark Communications.