We're clear for take off.

ANDOVER, MA, May 17, 2007 - WSI Corporation (www.wsi.com) has once again been named the winner of the Pro Pilot PRASE award for Best Weather Service. Each year Professional Pilot Magazine conducts the PRASE survey of corporate pilots to determine the best of class in services and equipment for the business aviation industry. This is the ninth year in a row that pilots have chosen WSI's pre-flight briefing service, WSI Pilotbrief®, as the best professional weather briefing service.

"To be recognized by the readership of Professional Pilot for nine years in a row is a significant achievement for both WSI and our customers,” stated Jim Menard, General Manager of WSI's Aviation Business Group for WSI. "WSI has spent close to three decades collaborating with pilots to design the most accurate and relevant aviation weather products to promote safer and more efficient flights. The WSI Pilotbrief product line is a direct result of this team work and for that we extend our appreciation and gratitude to our customers for their continued support and feedback."

WSI provides the world's most innovative and trusted briefing solutions for aviation professionals through every phase of flight. WSI's pre-flight briefing solutions include WSI Pilotbrief, a satellite delivered service delivering WSI NOWrad® national and regional radar, radar summary charts, high-resolution satellite imagery, plotted SIGMETs, AIRMETs, and more around the clock. Daily, thousands of aviation professionals trust the WSI Pilotbrief system, at the nation's top FBOs and corporate flight departments, to provide the necessary information to plan safe flights. WSI also delivers the latest aviation weather information to the cockpits of aviation aircraft with WSI InFlight®.

About WSI Corporation
WSI Corporation is the world's leading provider of weather-driven business solutions for professionals in the aviation, media and energy markets, and multiple federal and state government agencies. WSI is headquartered in Andover, Massachusetts with offices in Birmingham, England, and is a wholly owned subsidiary of Landmark Communications, Inc.