News Release   Aug 24 2004 OSI announces appointment of new director Vancouver, Canada — Mr. Raymond W. Johnston, Chairman of the Board of the Directors of Offshore Systems International Ltd (OSI) (TSX: OSI / OTCBB: OFSYF), is pleased to announce the appointment of Mr. E. Brinton Coxe to the company’s board of directors. Mr. Coxe brings to OSI more than 25 years of experience in the areas of corporate finance and mergers and acquisitions. He is Chairman of E.B. Coxe & Co., LLC of Greenwich, CT., a company that specializes in finding, funding, and managing small cap companies. Mr. Coxe is also a strategic partner of SDS Capital Partners, LLC, a group of investment funds with more than US$350 million under management. Mr. Coxe provides senior advisory services to the fund in connection with transactions and financings. Mr. Coxe’s strong ties with the eastern U.S. investment community will assist OSI in pursuing growth opportunities in the U.S. Mr. Coxe, a resident of Greenwich, CT., holds a B.A. in Economics from St. Lawrence University in Canton, New York. About Offshore Systems International Ltd. Offshore Systems International Ltd (OSI) is a leader in electronic geography. The company’s core strengths lie in the ability to produce, manage and display many forms of geographic data. The company provides display systems and data for several defence, government and commercial customers. OSI conducts its operations through three business units: OSI Geomatics (data production and distribution), OSI Navigation Systems, and OSI Applications (products and services for command and control systems). OSI’s common shares are listed for trading on the Toronto Stock Exchange (TSX: OSI) and the OTC Bulletin Board (OTCBB: OFSYF). For more information please visit www.osil.com. Forward-Looking Statements This news release contains discussion of items that may 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, with respect to achieving corporate objectives, developing additional project interests, OSI’s analysis of opportunities in the acquisition and development of various project interests and other matters. These statements are made under the ‘safe harbour’ 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. Although Offshore Systems International believes the expectations reflected in such forward-looking statements are based on reasonable assumptions, it can give no assurances that its expectations will be achieved. Factors that could cause actual results to differ from expectations include the effects of general economic conditions, changing foreign exchange rates, actions by government authorities, uncertainties associated with contract negotiations, and industry supply.   For more information contact: Jane Hayward Investor Relations +1 613 287 0462 or +1 888 880 9797 +1 613 287 0466 (FAX) invest@osigeospatial.com