EXHIBIT 13.1 SECTION 906 CERTIFICATIONS Pursuant to section 906 of the Sarbanes-Oxley Act of 2002, I, John A. Jacobson, President and Chief Executive Officer of Offshore Systems International Ltd., do hereby certify, based on my knowledge, that: - the Annual Report on Form 20-F for the year ended November 30, 2003 of Offshore Systems International Ltd. fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, and - the information contained in the Form 20-F fairly presents, in all material respects, the financial condition and results of operations of Offshore Systems International Ltd. Date: May 25/04 /s/ John A. Jacobson ------------------------------------- John A. Jacobson President and Chief Executive Officer 417 EXHIBIT 13.2 SECTION 906 CERTIFICATIONS Pursuant to section 906 of the Sarbanes-Oxley Act of 2002, I, John T. Sentjens, Corporate Controller of Offshore Systems International Ltd., do hereby certify, based on my knowledge, that: - the Annual Report on Form 20-F for the year ended November 30, 2003 of Offshore Systems International Ltd. fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, and - the information contained in the Form 20-F fairly presents, in all material respects, the financial condition and results of operations of Offshore Systems International Ltd. Date: May 25/04 /s/ John T. Sentjens ------------------------ John T. Sentjens Corporate Controller 418