National Geographic : 1945 Dec
Winning the War of Supply 715 U. S . Navy, Official Two Damaged Ships Are Lifted out of the Water in a Navy Floating Drydock These ABSDs, or Advanced Base Sectional Docks, can hold the largest battleships. Steel sections are towed out to forward areas and welded together to form one large dock, located in sheltered waters of an advanced base. Walls contain machine shops, foundries, and air-conditioned living quarters for crews. Ships not too badly damaged can be fully repaired in these docks and returned to active duty without making the long voyage to the United States. Water is let in to sink the dock, the damaged ship is moved into place, and the water is then pumped out, lifting both dock and ship. In this dock are a cargo vessel and an LST. Barges contain additional repair facilities.