News Release   October 28 2004 OSI awarded $1.6 million in contracts by Lockheed Martin UK for UK Royal Navy Vancouver, Canada — Offshore Systems International Ltd (OSI) (TSX: OSI / OTCBB: OFSYF) announced today that Lockheed Martin, one of the Company’s teaming partners in the UK, has awarded OSI contracts valued at approximately CDN$1.6 million for software upgrades and systems related to the Royal Navy’s deployment of OSI’s ECPINS-M, a highly advanced electronic chart navigation system for military customers. “These follow-on contracts clearly demonstrate the progress and success OSI and the Lockheed team have had to date with meeting the Royal Navy’s requirements,” said John Jacobson, President and CEO of OSI. “OSI has met its early contract milestones on this program, we’ve delivered a high-quality product and we are optimistic that we can build on our early success to broaden and deepen our relationship with both Lockheed Martin and the Royal Navy.” The largest of the two contracts is for software upgrades to enhance the Royal Navy’s electronic chart system software capabilities for submarine and surface navigation, adding functions which were options under the Royal Navy fleet contract announced in January 2004. In addition, OSI will supply new systems and software for the initial deployment of the Automated Identification System for the Royal Navy. The Automated Identification System is a transponder-based tracking system that tracks ships using a radio network and Global Positioning System data. It is a safety system, primarily for civilian vessels, that improves vessel safety in crowded waterways and ports. 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