You are here

Mk 45 Mod 4 Naval Gun System

Mk 45 Mod 4 Naval Gun System

Mk 45 Mod 4 Naval Gun System

The 5-inch (127-mm) 62-caliber Mk 45 Mod 4 Naval Gun system is in U.S. Navy service today, and is ready to significantly enhance Naval Surface Fire Support (NSFS) and overall mission performance. Major upgrades of the Mk 45 Mod 4 include a 62-caliber barrel, strengthened gun and mount subsystems, advanced control system enhancement, and a reduced signature, low maintenance gun shield.

The Mk 45 Mod 4 provides NSFS range of more than 20 nautical miles (36 km) with the Navy's new 5-inch Cargo projectile and an improved propelling charge. The system will also provide NSFS range of more than 60 nautical miles (111 km) with the near-term integration of the 5-inch Extended Range Guided Munition (ERGM) and propelling charge. U.S. Navy ERGM Initial Operational Capability is scheduled for 2006.

Operation and performance of these extended-range munitions are tailored for optimal effect and range in unison with the major subsystem upgrades of the Mk 45 Mod 4 Naval Gun. The optional Lower Ammunition Hoist Mk 6 and ERGM Handling Mechanism (EHM) Mk 42 are available to optimize Mk 45 Mod 4 munition transfer and handling.

Starting with DDG 81, Mk 45 Mod 4 is being forward-fit to U.S. Navy DDG 51 Class destroyers. Other Mod 4 applications include installations for the fleets of South Korea, Japan and Denmark. Existing Mk 45 Mods 0-2 mounts can be upgraded to the Mod 4 configuration, which is planned for CG 47 Class ships as part of the Navy's Cruiser Modernization Program.

In June 2005, BAE Systems was awarded a $44.1 million contract modification by the Naval Sea Systems Command for the production of three Mk 45 Mod 4 Naval Gun systems. The three guns ordered by the Navy are for installation aboard the Navy's DDG 110 through DDG 112.

BAE Systems provides more than 30 years of experience with Mk 45 Mods 0-4, with more than 230 shipboard applications in the U.S. Navy and nine fleets worldwide. Full life-cycle support is keyed to the customer, and can be supplemented by the worldwide logistics system supporting the U.S. Navy.

Colophon