The dry dock is a construction including a pool level with the ground. The system is equipped with a mechanism to bring in and release water. It is also equipped to construct a repair ship. The dry dock will have a horizontal bearing and the launch will proceed by flooding the pool. Some of the benefits of building the ship on a dry dock include more building efficiency, at launch it is not necessary to worry about the beam or sail length. Disadvantages of the dry dock include limits to the dimensions of the ship and greater energy use. Mounting system in the dry dock is the same as any other. Selection of the mounting system depends on the shipyard. The shaoe of the mounting system may be island form, peninsular form, pyramid form or ring form. The type of moutning system that can be selected depends on the technology available in the shipyard. When docking a repair ship in the dry dock the ship in the dock enters without power drive with help of a tug boat. Most of the time the boat is in low tension, so the reaction force in the subclass is calculated as the ship enters the doc at the first touch of the stern loom to the subclass. When the ship sits on the sub-blocks over the entire length of the keel, the weight of the ship is allocated to the substocks and then to the dock. When implementing a dry dock into an existing shipyard, it is first necessary to analyze and test the soil and the area around which the dry dock would be built. To invest in such a big new project, the most important thing is to make a long-term plan so that the investment pays off and that the shipyard does not get into debt.