Marine Information Research Center Japan Hydrographic Association Mishima Bldg. 5F, 7-15-4, Ginza, Tokyo 104-0061, Japan Telephone: +81-3-3248-6668 Facsimile: +81-3-3248-6668 E-mail: mirc@mirc.jha.or.jp URL: http://www.mirc.jha.or.jp/en/