Raytheon has secured an additional $149m from the US Navy for 74 Standard Missile-6 (SM-6) all up rounds, spares, containers, and services.
In June, Raytheon received a $149m contract from the navy for this programme.
The surface-to-air supersonic missile SM-6 is designed to defend against land-attack and anti-ship cruise missiles in flight.
It is also capable of engaging manned and unmanned aerial vehicles, as well as fixed- and rotary-wing aircraft.
SM-6 senior programme director Mike Campisi said: "The SM-6 has advanced capabilities and speed.
"Combatant commanders want their deployed ships armed with as many of these interceptors as possible, and we're ramping up production to meet that need."
Featuring active and semi-active guidance, advanced fusing techniques, as well as signal processing and guidance control capabilities, SM-6 uses the time-tested benefits of the SM airframe and propulsion, providing an over-the-horizon air defence capability.
Raytheon has delivered more than 160 SM-6 units since the missile was first deployed in 2013.
In March, Raytheon secured a contract worth approximately $110m from the US Navy to supply the long-lead materials to meet SM-6 full-rate production requirements and SM-2 sustainment.
If exercised, the options included in the latest contract will bring the total value of the transactions during fiscal year 2015 to 2016 to approximately $563m.
Recently, Raytheon collaborated with the US Naval Undersea Warfare Center (NUWC) - Division Newport, in a bid to improve the features of its AN / AQS-20A minehunting sonar.
This partnership aims to analyse the system's synthetic aperture sonar in order to fully optimise its ability to capture and process high and low-resolution images of mine threats undersea.
Image: SM-6 delivers a proven over-the-horizon air defence capability by leveraging the advantages of the SM's airframe and propulsion. Photo: courtesy of Raytheon Company.