AGM-158C LRASM

I’ve complained before about the lack of modern American antiship missile options. Finally, the rebuilding Chinese Navy has gotten Lockheed Martin to answer the call. Building upon their excellent AGM-158 JASSM air-launched cruise missile, Lockheed has made a new antiship missile that checks pretty much all of the boxes I might have and then some.

The LRASM (Long Range AntiShip Missile) is based on the AGM-158B JASSM-ER. It’s low-observable for both infrared and radar sensors, and comes with a nice 1,000 lb. penetrating blast fragmentation warhead. It flies at a medium altitude towards the target, then dives for a sea-skimming terminal attack. While it has good range, estimated at about 350 nautical miles, this is rather less than the 500 nautical miles or so that the AGM-158B can manage, and most of that is due to the fancy new multimode seeker system.

LRASM comes with a fancy multimode imaging infrared and active radar homing seeker system, to help it find ships and not be spoofed by decoys. It also includes a datalink for external targeting information, and the inertial/GPS navigation system that you’d expect to find on a cruise missile. While the launch platform can designate targets for it, the LRASM is also capable of searching for targets autonomously. It can also pull targeting data from its radar warning receivers and passive RF sensors. This formidable sensor suite gives LRASM excellent targeting capability, and a wide variety of attack options for the commander.

Since JASSM and JASSM-ER are both air-launched platforms, the US Navy originally envisioned LRASM, and will initially deploy it, as an air-launched weapon. It’s being integrated onto F/A-18E/F Super Hornets and B-1B Lancers. The Lancers are noteworthy for being able to carry 24 AGM-158Cs, and give a long-range land-based naval attack capability to the United States for the first time in a while. However, testing showed that by adding the booster used on Lockheed Martin’s RUM-139 VL-ASROC, LRASM could be launched from Mk. 41 VLS tubes. This would give Mk 41 equipped ships the ability to easily be configured to have a formidable surface attack capability, and would remove the need for supplemental harpoon launchers.

LRASM is a modified land-attack cruise missile, and it has been tested against land targets in addition to ships. Its targeting systems work just as well against land targets. Right now, its range is less than ideal as a land-attack missile, but there are proposals to trade some warhead weight for more fuel to increase the range. Having one missile type for surface vessel attack and land attack would considerably simplify supply for the US Navy ships.

What do we think? It’s exactly what the doctor ordered. Low observability and an excellent targeting system are excellent features. Few current antiship missiles (from any country) actually take advantage of low-observability features. Plus, it’s great that it can be used from both aircraft and standard Mk. 41 VLS tubes. We’d buy lots as soon as they get put on the market.

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