28 June 2024

U.S. Navy Readies New Compact Agile Interceptor For Flight Tests

Carter Johnston

Amid growing concerns of missile inventory size and VLS cell count, the U.S. Navy is set to test a new surface-launched missile interceptor designed to maximize capacity in their Mark 41 VLS cells. The effort comes as production of SM-6 ramps up into the late 2020s to match inventory requirements, alongside increased production of RIM-162 ESSM Block II.

The Compact Agile Interceptor aims to pack multiple small diameter missiles into one Mark 41 VLS cell while keeping high-end performance capability to intercept ‘complex raids’ of hypersonic threats. The addition of a compact interceptor would add a third missile to the U.S. Navy’s inventory capable of dealing with hypersonic threats, coming in behind the 13.5 inch (0.34 m) SM-6 Dual I/II and 21-inch (0.53 m) SM-6 Block IB.

A leading contender for the CAI program–and a missile that has already been tested in a virtualized Aegis environment–is Lockheed Martin’s Patriot Advanced Capability 3 Missile Segment Enhancement (PAC-3 MSE). It has seen action in Ukraine against hypersonic aeroballistic missiles (the Kh-47M2 ‘Kinzhal’ or AS-24 Killjoy air-launched ballistic missile) and reportedly against hypersonic air-breathing missiles (the 3M22 ‘Zircon’ or ‘SS-N-33’ hypersonic cruise missile).

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