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The Mark 38 25 mm MGS provides ships with short-range capability against high-speed maneuvering surface targets (HSMSTs), [5] floating mines, and enemy swimmers. Ships close to land can use the system against enemy personnel and lightly armored vehicles. [2] It is a low-cost weapon that can operate in any weather condition, day or night.
Japanese 25×163mm ammunition from a post-war US technical manual A diagram of the M791 25×137mm round. Several sub-types of the NATO 25 mm ammunition are available—the most common being armor-piercing, high-explosive, sabot, tracer, and practice rounds. Cartridges are usually composed of a combination of the aforementioned categories. For ...
Within the framework of the product support service Oerlikon improves the product and adapts it regularly to the latest requirements. An important step forward was made in 1982/83 when the ammunition penetration performance range of the 25 mm APDS-T (sub-caliber) round was increased 150% from 1000 to 2500 m.
The Mark 38 Gun Fire Control System (GFCS) controlled the large main battery guns of Iowa-class battleships. The radar systems used by the Mark 38 GFCS were far more advanced than the primitive radar sets used by the Japanese in World War II. The major components were the director, plotting room, and interconnecting data transmission equipment.
The M1 ammo crate held a total of 1,000 belted or linked rounds packed in 4 M1 ammo boxes and the later M1A1 ammo crate held a total of 1,000 belted or 1,100 linked rounds packed in M1A1 ammo boxes. There were two .50 M2 ammo boxes to a crate (for a total of 220 belted or 210 linked rounds) with a volume of 0.93 cubic feet.
The feed direction for the percussion-primed 25 × 137 ammunition can be manually or remotely selected, through an electrical feeder selection device. The first round fired following selection comes from the belt that has just been selected. The external power feature can be used for maintenance and training using dummy rounds.
Each round disperses 152 small tungsten projectiles [3] [4] weighing 3.3 grams (0.12 oz) each to form a lethal cone-shaped cloud to strike the incoming target. [2] Whilst these are too small to do major damage in themselves, the accumulation of damage from multiple strikes is expected to destroy wings and control surfaces, sensors and ...
The Mark 17 gun in the Mark 40 submarine gun mount may have used semi-fixed ammunition (case and projectile handled separately), but existing WW II photographs, drawings of ammunition storage, and museum ships all show fixed ammunition (one piece service round). It had a range of 14,500 yards (13,300 m) at the maximum elevation of 40 degrees. [5]