The Senate Appropriations Committee in its proposed FY-21 defense spending bill would cut funding for the CPS program by $388 million, a nearly 40% reduction to the Navy's $1 billion request, noting the panel understands the need for the new class of weapons and supports the endeavor but has misgivings about current plans to scale the effort.
A report accompanying the committee's spending bill reveals new information about the project, including the existence of a recently completed independent cost estimate prepared by the director of the office of cost assessment and program evaluation.
While the committee report doesn't disclose the total sum of the cost estimate, it reveals that CAPE found the Navy's acquisition strategy, technical baseline, and schedule programmatic definitions lacked specificity. In addition, CAPE flagged potential issues that could signal problems with future cost growth in the program, including "the Navy's optimistic assumptions with respect to CPS engineering development, the concurrent development of CPS blocks, as well as significant funding shortfalls in the outyears," according to the Senate report.
In December 2018, then-Chief of Naval Operations Adm. John Richardson set a 2025 target for fielding a sea-based, offensive hypersonic strike conventional weapon. That goal, which maintains service policy, calls for putting the new hypersonic boost-glide weapon on the fleet of four conventionally armed Ohio-class SSGN submarines.
The Navy's FY-21 budget proposal outlined new plans to also begin integrating the hypersonic weapon on variants of the Virginia-class boats outfitted with a Virginia Payload Module for initial operation as soon as fiscal year 2028 -- just as the SSGN fleet begins retiring. The VPM is the newest variant of its attack submarine class, stretched to accommodate additional missile tubes that have been eyed for a conventionally armed hypersonic boost-glide body since the VPM program was announced in 2012.
"The Committee recognizes the need for and continues its support of the CPS program, but is concerned by the Navy's acquisition approach and the Director, CAPE's, findings," the appropriators' report states. "Therefore, to ensure continued development progress towards a CPS capability while reducing acquisition risk, the Committee recommends a reduction of $248.8 million for the procurement of CPS all-up rounds in fiscal year 2021 that are excess to rounds required to execute the flight test program; a reduction of $35.9 million to contractor-led CPS block 2 upgrades; and a reduction of $104 million for Virginia-class modifications and installations."
The Senate panel's legislation would also direct the Navy acquisition executive to review the CPS program's acquisition strategy.
The Navy's FY-21 budget request projected the CPS program would require $5.8 billion through FY-25.
The Senate report reveals that the current five-year plan envisions procuring 25 all-up rounds during the developmental stage of the program.
In October 2019, the Navy assumed stewardship of the CPS program -- a continuing technology development effort -- from the Office of the Secretary of Defense. The Navy and the Army are cooperating to develop a prototype operational system that uses the same booster and a common hypersonic glide body developed as part of the CPS program.
The Navy is spearheading design of the C-HGB and the Army is responsible for production of the glide body for the two services.
Following a March flight test, the Defense Department announced the end of the technology experimentation phase and the launch of the system development phase for prototype weapon systems the Army and Navy aim to deploy. The Army's program aims to repurpose the Navy booster on a road-mobile system in a prototype Long Range Hypersonic Weapon battery by 2023.
Legislation proposed by the House Armed Services Committee in its version of the FY-21 defense policy bill would mandate the Navy begin integrating the CPS hypersonic weapon on the Zumwalt-class (DDG-1000) destroyers beginning Jan. 1, 2021.
Hypersonic weapons travel at least five times the speed of sound and are one of two types: glide vehicles or air-breathing. The CPS program is focused on glide-vehicle technology, where the payload is lifted on ballistic missiles to the edge of space then released to skip unpowered along the rim of the atmosphere with the ability to maneuver in flight. This trajectory allows this new class of weapons to exploit a huge blind spot in existing air and missile defense sensors, giving them an air of invincibility.