News Release   March 30 2005 Offshore Systems International completes first product deliveries of COP-TDS™ to customers in U.S. and Canada Vancouver, Canada — Offshore Systems International Ltd. (TSX: OSI/ OTCBB: OFSYF) announced today the successful completion of first product deliveries of COP-TDS™ (Common Operational Picture – Tactical Display Server) to customers in the U.S. and Canada. COP-TDS™ is a new server for the display of track, target and tactical information, such as mission and operational data, for command and control systems. Command and control systems manage all aspects of a military or security operation, from the deployment and maintenance of vehicles or personnel, to targeting (where things are) and tracking (where things are going). “Our new tactical display server is a highly versatile tool to enable analysis and decision-making for governments or battle commanders at the strategic, operational or tactical level,” said John Jacobson, OSI President and CEO. “It is a very powerful system for retrieving, filtering and displaying target information in support of mission planning and execution.” COP-TDS™ is highly flexible, easily integrated into legacy systems or new applications, and meets both U.S. and NATO military symbol standards. The new product is able to handle thousands of tracks from multiple-sources in real-time and creates a common picture for display on any tactical, operational or situational awareness command and control system. It is both highly available and highly scalable, meaning numerous computers and servers can interact seamlessly, while supporting clustering technologies. With its open Application Programmer Interface (API) and wide support of data types, “the product meets demanding government interoperability requirements,” said Jacobson. OSI’s COP products specifically address the top issues facing global command and control programs by providing a common operational picture for situational awareness and interoperability among military forces and coalitions. “They allow for the sharing of geospatial and tactical data across traditional joint and coalition force boundaries,” explained Jacobson. “They also support network centric warfare by eliminating traditional stovepipes between systems and applications among diverse users, as well as building a bridge between critical navigation systems and operational command and control systems.” In 2004, Frost & Sullivan, an independent research firm, reported close to US$20 billion was spent in the command and control, communications, computers, intelligence, surveillance and reconnaissance (C4ISR) market. Based on this and other research, OSI estimates that in its area of expertise, US$400 million is spent annually for high-performance geographic displays for command and control. Early customers of OSI’s COP products include Terma A/S, which has integrated the technology into its T-Core flexible command system, currently deployed by the Royal Danish Navy. Terma is now marketing this system in Europe and North America. The U.S. Navy Naval Sea Systems Command is also an early adopter of the technology. About Offshore Systems International Ltd. Offshore Systems International Ltd. (OSI) is a pioneer in geospatial intelligence and a world-leading fleet supplier of electronic chart systems and software for navigation and situational awareness. The Company is fleet supplier to six NATO navies and their close allies, and its ECPINS® (Electronic Chart Precise Integrated Navigation System) product line is installed or under contract for installation on more than 340 major warships worldwide. The Company’s core competency is electronic geography and the production, management and display of many forms of geographic data. The Company provides display systems and data for several defence, government and commercial customers, and conducts its operations through three business units: OSI Navigation Systems (moving map display systems and software), OSI Applications (situational awareness products and services for command and control systems) and OSI Geomatics (digital map and electronic chart data production services: land and marine). OSI’s common shares are listed for trading on the Toronto Stock Exchange (TSX: OSI) and the OTC Bulletin Board (OTCBB: OFSYF). Visit OSI’s website at www.osil.com for more information and the latest Company updates. 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