The 3"/70 Mark 26 Gun was a US post war naval anti-aircraft gun. Developed as a joint project with the United Kingdom, which called it the QF 3-inch Mark N1 gun, it had a water-cooled barrel combined
3"/70 turret on USS Carpenter in 1962
The Mark 42 5"/54 caliber gun is a naval gun mount used by the United States Navy and other countries. It consists of the Mark 18 gun and Mark 42 gun mount. United States naval gun terminology indicat
3-inch/70-caliber Mark 26 gun
…a VT radar proximity fuze. The twin barrel mount was believed to be more effective against faster aircraft and guided missiles than the single mounted 5"/54 caliber Mark 42 gun, hence, the single barrel version of the Mark 26 never saw service use. The Mark 26 was the last of four versions of the 3"/50 caliber AA (anti-aircraft…
5 inch/54 Mark 42 on USS Turner Joy
Two of the eight turrets of the carrier USS Ranger firing, in 1961.
Side profile of the 5-inch gun from HMAS Brisbane