BAE Systems has received a contract from the US Navy to upgrade four additional Mk 45 gun systems installed on its Arleigh Burke-class, DDG 51, guided missile destroyers.
The latest $50m order follows after the navy exercised an option as part of $130m contract that was awarded in August 2015.
The original contract covered the upgrade of six Mk 45 systems.
BAE Systems weapon systems vice-president and general manager Joseph Senftle said: “The proliferation of high-volume, low-cost threats is driving the need for multi-mission, cost-effective precision fire from naval guns like the Mk 45.
“As a leader in large-calibre naval guns and precision guided munitions, our team is committed to developing reliable and affordable technology that adapts faster and reaches farther than ever before.”
Under the contract, BAE will provide key upgrades to the Mod 4 configuration, such as a mechanically strengthened gun mount to allow the gun to achieve 50% higher firing energy.
A fully digitised control system will also be provided to offer more computing power while using a user interface that is similar to a smartphone.
The enhancements will allow seamless integration of targeting and fire control data, such as GPS, positioning the Mk 45 to fire precision guided munitions at unprecedented ranges.
BAE system will perform the upgrade work at its facility in Louisville, Kentucky, US, with support from its facility in Minneapolis.
The first upgraded gun is slated to be delivered at the end of next year, with the last delivery scheduled for 2020.
The Mk 45 is a 5in lightweight and most compact fully-automatic naval gun, which is currently in use with the US Navy and ten international fleets.
Image: BAE Systems to upgrade four additional Mk 45 systems. Photo: courtesy of BAE Systems.