Super large dock project
Super large dock project super large dock uses semi submersible ship, also known as semi submersible mother ship. It submerges the loading deck into the water through the adjustment of its own ballast water, so as to float the specific goods to be carried (such as barges, yachts, ships, drilling platforms, etc.) from the designated position onto the loading deck of semi submersible ship and transport the goods to the designated position. Semi submersible is a special ship design method. Different from ordinary surface ships, semi submersibles usually have a deep draft, but they are not completely hidden in the water like submarines, but some hull or structures are exposed outside the water. Due to the high volume proportion hidden in the water, the semi submersible is less vulnerable to the influence of waves on the sea surface, can maintain better stability and is suitable for use as a working platform on the water. The earliest semi submersibles were developed for the use of offshore drilling platforms, but there are also uses including semi submersible crane vessels, SSCV, offshore support vessels, OSV, offshore production platforms and so on. Many semi submersibles are fixed in a specific position by mooring and do not have power. Therefore, they need to be transported to the setting place by heavy lift shift, which is also a kind of special ships such as ships often adopting semi submersibles; However, there are also semi submersible platforms with slow-moving capability, such as sea-based X-band radar, which can move at sea with their own power.