The time required for cleaning, dehumidifying and purging ofcargo holds has a direct effect on the turn around time of vessels carrying moisture sensitive goods in port. This proproject will thoroughly research the requirements for dehumidification, develop design criteria, design criteria , design a refrigerant type dehumidifier, construct a proto type, and test the equipment in the field. Particular p problems to be addressed include mass and thermal loading s on a dehumidifier, optimum sizing, interfaces with other equipment, mobility and requirements for handling at docksidside.