... propeller but prevent the sea water outside the hull from comingn as well. For the fore end of stern tube is connected either with the shaft tunnel or the engine room, while the rear end is in ... and the following requirements for the alignment must first be met with. (1)All the fabrication, welding and hot work for the calibration below the upper deck to be completed. In addition, the ... contact with sea water. Therefore, both ends of a stern tube have to be best sealed to avoid the leakage of the lube oil inside the tube and, the entering of sea water. For stern tube sealing...