In this paper,the necessity for steam condese -water full closed redeem technique is analyzed, the steam condense-wa-ter full closed redeem system based on PLC is developed,and the structure diagram,signal detect method,control logic relation,the keypoint of PLC program project as well as boiler priority supply electrical circuit chart are given.

The structural vibration of a totally enclosed body-concealed mast is calculated using the ANSYS structural analysis software, for two different boundary conditions, while the structural strength is calculated for ship moving among waves.