Dry dock is a structured area where the construction, repairs, and maintenance of the vessels would be conducted. This unique marine structure allows an area to be filled up with water that causes the vessels to be maneuvered in and out of the area. After that, once the vessel enters the dry dock, the gates will close and the seawater will be drained out. Then the hull and other areas of the ship which have been exposed to seawater for a long time are available for carrying out construction, repair, and maintenance works.