LRAW will replace the currently fielded VLA missile systems, which are also known as RUM-139 Vertical-Launch Anti-Submarine Rocket (VL-ASROC).

The VLA weapon system comprises a solid-propellant booster coupled to a lightweight torpedo. It can be deployed from any Aegis-equipped cruisers and destroyers housing the Mk-41 Vertical Launching System (VLS) and the SQQ-89 ASW Combat System. It employs thrust vectoring and a digital autopilot to maneuver and guide the missile system through its various flight phases.

VLA is a primary weapon of choice for surface warships against submarines. It deploys the Mk 54 Mod 0 lightweight torpedo to a standoff range in excess of 10 miles from the point of launch.

The LRAW system`s exact working mechanisms are not known, but they are likely to be based on previous-generation VLA systems. These comprise vertically launching the torpedo by rocket assist to a water-entry point close to a submarine contact. Post water entry, the torpedo enters a helical search pattern for submarine detection and neutralization.

Development timeline

As per the Navy’s RDT&E document, the technical reviews for the LRAW were conducted for two years (from 2024 to 2025). As per the schedule, the program will be initiated in the first quarter of 2027. Post which, the development, testing, and evaluation phases will commence, which are likely to last for five years (from the first quarter of 2027 to the fourth quarter of 2031).

These phases will carry out modifications to the existing VLA rocket, initiate design, design containers and test equipment, build test articles, and conduct an engineering qualification, development testing, and operational testing of the prototype LRAW system.

Funding

The funding allotments include $11.42 million for FY 27 and a total of $152.26 million from FY 28 to FY 31. The schedule also mentions AUKUS, indicating a probable joint development with the UK and Australia under the wider scope of AUKUS Pillar II.