USS Independence (CVL-22) SBD Dauntless Rear Gunner , 1943
Aims his plane's twin .30 caliber machine guns aboard USS Independence (CVL-22), during the carrier's shakedown period, April 30, 1943.
Note the guns' armor plate, gunsight, and variety of bullet types (with tip marking sequence: red, black, light blue & plain). This corresponds to different types of ammunition: tracer, armor piercing, fragmentation and copper jacketed.