. The Mark 18 AP shells of Guam and her sisters, although fired from 12-inch guns, were capable of a 38,573 yard range and thought to be able to penetrate as much as 18 inches of side armor at 10,000 yards. They could fire at a rate of three rounds per minute. Photo caption: Halftone photo of the ship’s bow during main battery gunnery practice, 1944-45. Copied from the ship’s wartime cruise book, U.S.S. Guam: Her Story, 1944-1945. U.S. Naval History and Heritage Command Photograph.
Catalog #: NH 90740