The 5"/25 (127 mm) battery aboard the U.S. Navy battleship USS New Mexico (BB-40) prepares

The 5"/25 (127 mm) battery aboard the U.S. Navy battleship USS New Mexico (BB-40) prepares to fire during the bombardment of Saipan, 15 June 1944.
Note the time-fuze setters on the left side of each gun mount, each holding three “fixed” rounds of ammunition; the barrels of 20 mm machine guns at the extreme right; and triple the 14"/50 (34.5 cm) guns in the background.

(Source: Official U.S. Navy photo 80-G-K-14162 from the U.S. Navy Naval History and Heritage Command)