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Mk 45
IOC: 1971
Mk 45 mod 4
IOC: 2001
Unitary Cost: USD$22 million
Origin
United States of America
Contractor/s
United Defense
Applications
DDG 51 Flight IIA
F370
Hobart
KDX-II
KDX-III
Family Members
Mk 45
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Description:
The Mk 45 Mod 4 is a 127mm/5-inch 62 calibers naval gun in service in US Navy destroyers providing surface fire support. It is the latest Mk 45 gun development and provides littoral warfare fire support through the ERGM family of munitions.
The Mk 45 Mod 4 provides a range in excess of 21 nautical miles with current non-assisted ammunition. When the new EX171 ERGM munitions would be available the maximum range of the Mk 45 Mod 4 naval guns will be extended to 60 nautical miles.
The Mk 45 mod 4 includes a 62 calibers barrel, strengthened gun chamber, lengthened recoil stroke and an interactive touch-screen control system. The Mod 4 also includes a reduced radar signature and full compatibility for the ERGM family of munitions.
The DDG-81 USS Churchill has been the first US Navy ship to be equipped with the Mk 45 mod 4 naval gun. The US Navy plans to retrofit the mod 4 gun standard to existing surface combatants.
Specifications
Number of Weapons: 500
Dimensions: Diameter 127 mm
Performance: Max Range 111 km (60 nm)
Other: Max Rate of Fire 20 rounds per minute
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Notes
(*) lead contractor
IOC: Initial Operating Capability
FOC: Full Operating Capability
CEP: Circular Error Probable
Comm: Commissioning Date
Meters (m) Kilometers (km) Nautic Miles (nm) Inch (in) Yard (yd) Foot (ft) Millimeter (mm)
Pound (lb) Kilogram (kg) kN (KiloNewton) Ton (t)
Meters per Second (mps) Kilometers per Hour (kph) Knot (kt) Miles per Hour (mph)
Liter (l) Galon (gl)
Year (yr) Minutes (min) Second (sec)
Shaft-Horse-Power (shp)
Last Updated: Friday, October 10, 2008
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