News Release   February 15 2006 OSI Awarded C$3.0 million Mapping Contract Vancouver, Canada — Offshore Systems International Ltd. (TSX: OSI; OTCBB: OFSYF) (OSI) announced today that its mapping division has been awarded a five-year prime contract valued at approximately C$3.0 million, including all options if exercised. The contract to conduct a county-wide mapping project was awarded by Washoe County in Nevada. “The U.S. mapping company we acquired last April has positioned our mapping division to pursue and win prime contracts in the U.S.,” stated Ken Kirkpatrick, president and CEO of OSI. “Since the acquisition, we have secured city and county prime contracts with the City of Seattle and Pierce County in Washington; Lake Havasu City in Arizona; and now Washoe County in Nevada.” The mapping data generated by this contract will be used by Washoe County to fulfill local municipality needs and by the County’s Geographic Information Systems (GIS) program. Under the GIS program, Washoe County provides various types of mapping services, including online mapping and analysis tools, to other county and local government offices. To learn more about Washoe County and its online mapping services visit www.co.washoe.nv.us. About OSI Offshore Systems International Ltd. (OSI) is the world’s leading developer and supplier of military navigation systems. Focused on the defense and homeland security markets, OSI delivers advanced systems and software to address the growing need for enhanced situational awareness in command, control, and intelligence applications. By providing essential tactical and geospatial information, the company’s systems and software help decision-makers know the precise location of mission operations across all military forces while sharing data with allies. OSI systems are in use by military, government, and commercial customers around the world. The company is publicly traded on the Toronto Stock Exchange (OSI) and the Over the Counter Bulletin Board (OFSYF). For additional information please visit www.osil.com. Forward-Looking Statements This news release contains items that constitute forward-looking statements within the meaning of securities laws including Section 27a of the Securities Act of 1933, as amended, and Section 21e of the Securities Exchange Act of 1934, as amended. These statements are made under the ‘safe harbor’ provisions of the Private Securities Litigation Reform Act of 1995 and, as such, involve known and unknown risks and uncertainties and other factors that may cause the actual results to be materially different from the results implied herein. Offshore Systems International can give no assurances that its representations will be achieved or that it will update them at any time in the future.   For more information contact: Jane Hayward Investor Relations +1 613 287 8004 or +1 888 880 9797 +1 613 287 0466 (FAX) invest@osigeospatial.com