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The Mark 38 25 mm machine gun system (MGS) is a shipboard weapon system designed to protect warships primarily from a variety of surface threats, especially small, fast surface craft. [1] It consists of an M242 Bushmaster chain gun mounted on a turret that can be either manually or remote controlled, depending on variant.
In 1986, this requirement was satisfied with the introduction of the Mk 38 Mod 0 weapons system. A derivative of the M242 system, the Mk 38 consists of the M242 chain gun and the Mk 88 Mod 0 machine gun mount. It provides ships with defensive and offensive gunfire capability for the engagement of a variety of surface targets.
They also carried two Mark 25 launchers and electronics for the Basic Point Defense Missile System (BPDMS) which was added sometime in the 1970s and removed in the 1990s. Two 20 mm Phalanx CIWS systems were added in the 1980s for point defense. In recent years they have also carried Mk 38 25 mm Bushmaster cannons.
3-inch/21-caliber Mark 1 gun (field gun for United States Navy and United States Marine Corps) 57-mm/70-caliber Mark 110 Mod 0 Bofors gun; 40-mm/56-caliber Mark 1, 2, & M1 Bofors guns; 30-mm Mark 46 Bushmaster II gun; 1.1-inch/75-caliber gun; 25-mm/87-caliber Mark 38 Machine gun system; 20-mm/76-caliber M61A1 & 20-mm/99-caliber M61A1 Gatling ...
2 × 5 in (127 mm)/62 caliber Mark 45 Mod 4 lightweight gun; 2 × Mk 38 25 mm Machine Gun Systems; 2–4 × .50 in (12.7 mm) cal. machine gun; 2 × Phalanx CIWS Block 1B; 2 × Mk 32 12.75 in (324 mm) triple torpedo tubes; Aircraft carried: 2 × MH-60R Seahawk LAMPS Mk III helicopters.
In the anti-materiel role, a 25 mm weapon armed with armor-piercing rounds can disable many types of aircraft and ground vehicles, including some main battle tanks. The US military uses 25 mm weapons in their AV-8B Harrier, AC-130 gunship, M2 Bradley, LAV-25, F-35 Lightning II and as a standard ship-based munition in the Mk 38 autocannon.
Mark 3 Knife; Mark 34 Gun Weapon System; Mark 36 SRBOC; Mark 38 25 mm machine gun system; Mark V Special Operations Craft; Mark VI patrol boat; Mission Data Interface;
The Mark 12 5"/38-caliber gun was a United States dual-purpose naval gun, but also installed in single-purpose mounts on a handful of ships. The 38- caliber barrel was a mid-length compromise between the previous United States standard 5"/51 low-angle gun and 5"/25 anti-aircraft gun .