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MK 46 - 30mm Gun Weapon System

The MK 46 GWS is a remotely operated naval gun system that uses a 30mm high velocity cannon, a forward looking infrared sensor, a low light television camera and a laser rangefinder for shipboard self defense against small, high speed surface targets. The gun can be operated locally at the gun turret or remotely at the remote operating console in the Combat Information Center (LPD 17 & DDG 1000 classes)/Mission Control Center (LCS class).

The requirements documents for the DDG 1000, LPD 17 and LCS ship programs included the need for weapons systems capable of defeating small, fast, highly maneuverable surface craft. The MK 46 GWS was selected to provide these ships a capability against small surface craft. The MK 46 GWS is permanently installed aboard LPD 17 class ships. It is part of the Surface Warfare (SuW) mission module for LCS class ships.

The MK 46 Mod 2 GWS incorporates new open architecture, fault isolation software and an embedded trainer. The Navy is installing the MK 46 Mod 2 GWS aboard LPD 17 and DDG 1000 class ships during construction. The Navy designed and developed the SuW mission module for LCS class ships. When equipped, the LCS class ships will have two SuW mission modules (each including one MK 46 Mod 2 GWS).
Point Of Contact
Office of Corporate

Naval Sea Systems Command


Washington Navy Yard, D.C. 20376
General Characteristics
Primary Function: Shipboard self defense against small, high-speed surface craft.
Date Deployed: 2005 (Mark 46 Mod 1)
Range: 4,400 yards - max effective range for full caliber ammunition. Effective range can be extended with sub-caliber munitions. Rate of Fire: 200 rounds/minute. Modes of fire: single round, five-round burst, or fully automatic. Gun may be fired locally at the gun mount or remotely from the Combat Information Center.
Magazine Capacity: 400 rounds (dual feed, 200 per side).
Caliber: The MK 46 Mod 2 GWS includes the Mk 44 Mod 2 30mm cannon, a single barrel, open bolt, dual feed, electrically powered, chain driven automatic cannon.
Guidance System: A forward-looking infrared sensor, a low-light television camera, and a laster range finder provides inputs to a closed loop tracking system.
Platforms: MK 46 Mod 2 - LPD 17 class (2 mounts per ship), DDG 1000 class (2 mounts per ship) and LCS class (2 mounts per ship).
Last Update: 9 May 2016