As the first test case in our country, the damp-preventing eqipment named "Cargo Desiccator" was installed on the "Omurosan Maru", the tanker owned by the Mitsui Steam Ship Co. Ltd., aiming at an improvement in hull preservation by removing damp and water from the cargo tanks and keeping them dry as long as possible. Installed with the equipment, she ran between Japan and the U.S.A. carrying gasoline six times during ten months, form Nov.30, 1953 to Sept.22, 1954. This report describes the outline of the euqipment and compares the amount of corrosion reported by the captain during that period with that of an American tanker stated on the "Motor Ship", June 1953.
