Even after 150 years underwater, this iron gun carriage trunnion from the CSS Georgia remained in relatively good condition. Divers recovered this trunnion (also called a gudgeon) from among the wreckage of the Civil War ironclad. The trunnion allowed the gunner to pivot the cannon up and down on its carriage to bring the cannon into firing position. (An accompanying illustration highlights the position of the item on the gun carriage.) The crew of the CSS Georgia scuttled the ship in 1864 as Union troops entered Savannah. The Corps of Engineers must remove the remains of the CSS Georgia from the bottom of the Savannah River in order to increase the depth of the shipping channel. Artifacts recovered from the Georgia will be shipped to Texas A&M University for further study and preservation under a contract awarded as part of the Savannah Harbor Expansion Project (SHEP). (U.S. Army Corps of Engineers photo by Billy Birdwell.)