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CBRNE & EOD Defence

US Navy stretches modular MCM mindset with T-ESB 4 tests

24 September 2019
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The UUV Knifefish was tested aboard Expeditionary Sea Base USNS (T-ESB 4). Source: US Navy

The US Navy (USN) has further expanded its modular concept for countermine (MCM) operations with recent MCM equipment testing aboard the Military Sealift Command's Expeditionary Sea Base USNS Hershel Williams (T-ESB 4).

The MCM equipment and systems are part of the mission-module package designs meant for Littoral Combat Ships (LCSs), but the USN has been working to migrate those modules to other platforms as well to better distribute them across the fleet aboard what the service calls "vessels of opportunity".

Williams used the LCS MCM mission package portable control station to manoeuvre the MCM equipment and the launch and recovery equipment, as well as to test the command and control of unmanned vehicles during the tests that occurred in the Chesapeake Bay during mid-September, USN officials said.

Some of that equipment included the unmanned underwater vehicle (UUV) Knifefish and an unmanned surface vessel (USV). The tests marked the first time such unmanned vehicles were launched and recovered by an expeditionary sea base.

The USN plans to rely more on the synthetic aperture sonar (SAS) technology employed on Knifefish for MCM operations. The Knifefish will be used to detect and classify buried, bottom, and volume mines in high-clutter environments.

Unmanned systems such as the sonar-towing USV are being developed by the USN as part of the Unmanned Influence Sweep System (UISS) to provide the kind of future MCM operations US naval forces need.

UISS and the Knifefish UUV recently completed shipboard integration testing on board LCS USS Independence (LCS 2).

Knifefish reached Milestone C, Naval Sea Systems Command (NAVSEA) confirmed on 26 August, clearing the way for low-rate initial production (LRIP) of the system.

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