# U.S. Navy Awards $245M IRST21 Order

The U.S. Navy awarded Lockheed Martin a **$245 million contract modification** for the second full-rate production order of F/A-18E/F Infrared Search and Track 21 (IRST21) Block II systems, supporting U.S. and Australian forces. The order includes 48 infrared receivers, 74 processors, 27 inertial measurement units for the Navy, and test-equipment maintenance and lay-in material.

- The award represents a further production order for an airborne infrared sensing system; the signal does not provide a contract number or award date.
- Procurement teams and defense suppliers can use the listed equipment and support elements to understand the scope of this production tranche and assess relevant supply-chain capabilities.
- The order’s support for U.S. and Australian forces highlights an allied dimension to the procurement, while the signal identifies Lockheed Martin as the awardee.

**Jurisdictions:** federal
**Industries:** Defense & Military
**Published:** October 06, 2026

### Government Entities
- U.S. Navy (USN)
- Royal Australian Air Force (RAAF)

### Vendors
- Lockheed Martin (awardee)

### Sources
- [Lockheed Martin Nabs $245 Million Mod For Second IRST Block II Order - Defense Daily](https://www.defensedaily.com/lockheed-martin-nabs-245-million-mod-for-second-irst-block-ii-order/navy-usmc) - Defense Daily