United States, Oct. 21 -- Lockheed Martin has been awarded a $233 million firm-fixed-price contract to deliver IRST21(R) Block II systems and initial spares to the U.S. Navy and Air National Guard (ANG).THE BIG PICTUREIRST21 is Lockheed Martin's next-generation infrared search and track (IRST) sensor capability, a long-wave infrared system that passively detects and tracks airborne targets at extended ranges. By delivering longer range detection and faster target data, IRST21 Block II boosts warfighter situational awareness, cuts decision making time and keeps our armed forces mission ready to engage threats the instant they appear.WHY IT MATTERSThe Block II variant, contracted under this award, features cutting edge optics, advanced proces...