United States Navy has approved United Defense 57mm Mk 110 naval gun as the
Close-In Gun System (CIGS) for the DD(X) destroyer baseline design. The Mk 110
selection comes after Raytheon and United Defense conducted an exhaustive study
recommending the 57mm gun solution as the best solution.
The DD(X) CIGS function is to provide key ship self-defense and limited attack
capabilities in conjunction with other ship's sensors and weapons such as the
AGS cannon and the Mk 57 vertical launching system.
In September 2003, Bofors Defence AB of Sweden, a wholly owned subsidiary of
United Defense, 57mm Mk3 naval gun was selected for use aboard the US Coast
Guard's Maritime Security Cutter - Large (WMSL) under the Coast Guard's
Deepwater program. The gun was designated EX-57 Mk3 and ultimately the US Navy
approved the weapon to be designated as the Mk 110 mod 0.
The Mk 110 naval gun will fire 3P family of ammunition suitable for engagements
against air, sea and shore targets. The Swedish 3P ammunition has been
re-designated the Mk 295 mod 0 and will give the Mk 110 naval gun increased
tactical flexibility and ammunition effects.
Currently the US Navy surface combatants rely upon Raytheon's Mk 15 Phalanx 20mm
multi-barrel gun as their close-in weapon system (CIWS). The single barrel, larger
caliber Mk 110 Mod 0 naval gun selection for DD(X) destroyers shows up that the
US Navy is changing its mind in order to counter 21st century threats. In
addition, other shipbuilding projects in the United States, such as CG(X), might
follow DD(X) selecting Mk 110 gun as CIGS.
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