| USS Iowa (BB-61) |
| 80-G-K-16469 (Color) -- 20mm gun crew in action on the battleship's forecastle, probably during her shakedown period in the late winter and spring of 1943. |
| Note gunner using the Mark 14 lead-computing gunsight mounted on the 20mm gun as right. |
| Official U.S. Navy Photograph, now in the collections of the National Archives. |
| Naval Historical Center -- Online Library of Selected Images of USS Iowa |
