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US Navy wants to develop and procure three types of large naval unmanned vehicles for Fiscal Year 2021

According to a U.S. Congress report published on December 23, 2020, for the Fiscal Year 2021, the United States Navy wants to develop and procure three types of large naval unmanned vehicles (UVs). These large UVs are called Large Unmanned Surface Vehicles (LUSVs), Medium Unmanned Surface Vehicles (MUSVs), and Extra-Large Unmanned Undersea Vehicles (XLUUVs).
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Russian Vyborg Shipyard laid the Purga ice class coastguard ship of project 23550 925 001 US Navy’s naval unmanned surface concept. (Picture source NAVSEA)

The U.S. Navy wants to acquire these large naval UVs (Unmanned Vehicles) as part of an effort to shift the Navy to a more distributed fleet architecture. Compared to the current fleet architecture, this more distributed architecture is to include proportionately fewer large surface combatants (i.e., cruisers and destroyers), proportionately more small surface combatants (i.e., frigates and Littoral Combat Ships), and the addition of significant numbers of large UVs.

The U.S. Navy wants to employ accelerated acquisition strategies for procuring these large UVs, so as to get them into service more quickly. The Navy’s desire to employ these accelerated acquisition strategies can be viewed as an expression of the urgency that the Navy attaches to fielding large UVs for meeting future military challenges from countries such as China.

The U.S. Navy envisions LUSVs (Large Unmanned Surface Vehicles) as being 200 (61 m) feet to 300 feet (92 m) in length and having full-load displacements of 1,000 tons to 2,000 tons. The U.S. Navy wants LUSVs to be low-cost, high-endurance, reconfigurable ships based on commercial ship designs, with ample capacity for carrying various modular payloads—particularly anti-surface warfare (ASuW) and strike payloads, meaning principally anti-ship and land-attack missiles. Although referred to as UVs, LUSVs might be more accurately described as optionally or lightly manned ships, because they might sometimes have a few onboard crew members, particularly in the nearer term as the U.S. Navy works out LUSV enabling technologies and operational concepts. In marking up the Navy’s proposed FY2020 (Fiscal Year) budget, some of the congressional defense committees expressed concerns over whether the Navy’s accelerated acquisition strategies provided enough time to adequately develop concepts of operations and key technologies for these large UVs, particularly the LUSV.

In response, the U.S. Navy’s FY2021 budget submission proposes to modify the acquisition strategy for the LUSV program so as to provide more time for developing operational concepts and key technologies before entering into serial production of deployable units. Under the U.S. U.S. Navy’s proposed modified LUSV acquisition strategy, the U.S. Navy is proposing to use research and development funding to acquire two additional prototypes in FY2021 and one more additional prototype in FY2022 before shifting in FY2023 to the use of procurement funding for the procurement of deployable LUSVs at annual procurement rates in FY2023-FY2025 of 2-2-3.

The U.S. Navy defines MUSVs (Medium Unmanned Surface Vehicles) as being 45 feet (14 m) to 190 feet (58 m) long, with displacements of roughly 500 tons. The U.S. Navy wants MUSVs, like LUSVs, to be low-cost, high-endurance, reconfigurable ships that can accommodate various payloads. Initial payloads for MUSVs are to be intelligence, surveillance and reconnaissance (ISR) payloads and electronic warfare (EW) systems. The U.S. Navy is pursuing the MUSV program as a rapid prototyping effort under what is known as Section 804 acquisition authority. The first MUSV prototype was funded in FY2019 and the Navy wants fund the second prototype in FY2023. On July 13, 2020, the U.S. Navy announced that it had awarded “a $34,999,948 contract to L3 Technologies, Inc. for the development of a single Medium Unmanned Surface Vehicle (MUSV) prototype, with options to procure up to eight additional MUSVs.”

The first five XLUUVs (Extra-Large Unmanned Undersea Vehicles) were funded in FY2019; they are being built by Boeing. The U.S. Navy wants to procure additional XLUUVs at a rate of two per year starting in FY2023. The Navy’s FY2021 budget submission does not include funding for the procurement of additional XLUUVs in FY2021 or FY2022.

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