News Release   June 22 2005 OSI salutes its customers participating in the largest-ever International Fleet Review celebrating the 200 th anniversary of the Battle of Trafalgar -- More than 160 vessels from 35 nations to attend, including HMCS Montreal Vancouver, Canada -- Offshore Systems International Ltd. (TSX: OSI/ OTCBB: OFSYF) will be well represented at the International Fleet Review on June 28, 2005 in Portsmouth in the presence of Her Majesty the Queen to celebrate the 200th anniversary of the Battle of Trafalgar. About 160 vessels will be participating from more than 35 countries at the invitation of the Royal Navy in a rare event that dates back 600 years. Customers of OSI attending include the navies of Australia, Canada, Denmark, Portugal, the United Kingdom and the United States. The Royal Navy is celebrating the Trafalgar bicentennial with a number of events, including the International Fleet Review, as part of SeaBritain 2005 honouring Britain’s maritime heritage. The last Fleet Review took place 28 years ago for the Queen’s Silver Jubilee in 1977, with 19 nations taking part. This year’s Review will be the largest ever in number of countries attending, and include a wide variety of warships, merchant ships, tall ships, private small boats, helicopters and other aircraft in sail and flypasts. In addition to commemorating the achievements of Admiral Lord Nelson and his victory at Trafalgar, Trafalgar 200 is also about recognizing the strong maritime bonds of friendship and heritage among so many countries globally. The program for June 28 from 1300 to 2300 includes a Fleet Review by HM The Queen, a fly past, a sail past, an air display, a re-enactment of a 19th century sea battle, a fireworks display, and lighting up of The Fleet. OSI’s world-leading electronic chart navigation system will be on board several vessels attending the Review highlighting the fleet’s advanced technology, including the HMCS Montreal from Canada and the HMS Illustrious, HMS Nottingham and HMS Westminster from the United Kingdom. The Royal Navy has referred to electronic chart navigation as a “world-class system” and “an important step forward in the history of the British Navy’s navigation.” For more information about the International Fleet Review or Trafalgar 200, please visit www.trafalgar200.com. About Offshore Systems International Limited Offshore Systems International Ltd. (OSI) makes computer-based geospatial intelligence software, systems and data products mainly for large government and civilian customers. The company has three business units: OSI Navigation Systems (moving map display systems and software for naval surface ships and submarines), OSI Applications (network-based map and target display software and services for national defence) and Mapcon Mapping (digital map data production services for civilian customers). 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 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 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 actualresults 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 0462 or +1 888 880 9797 +1 613 287 0466 (FAX) invest@osigeospatial.com