News Release   October 11 2005 Offshore Systems International notice of earnings and conference call Vancouver, Canada — Offshore Systems International Ltd. (OSI) (TSX: OSI/ OTCBB: OFSYF) will release financial results for the fiscal 2005 third quarter on Friday October 14, 2005 at 8 a.m. (EST) with a conference call to follow at 8:30 a.m. (EST). To participate, please call 416-640-4127 or 800-814-3911. A taped replay of the call will be available until October 21, 2005 by calling 416-640-1917 or 877-289-8525, passcode 21156653#. The webcast will be archived at www.osil.com for approximately 90 days. About Offshore Systems International Ltd. Offshore Systems International Ltd. (OSI) makes geographic-intelligence software, systems and data products for large government and civilian customers. 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 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 0462 or +1 888 880 9797 +1 613 287 0466 (FAX) invest@osigeospatial.com