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Home» News»US Navy lays keel for the 4th ESB, the Future USS John L. Canley
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US Navy lays keel for the 4th ESB
CHESAPEAKE BAY (Sept. 15, 2019) The Military Sealift Command expeditionary sea base USNS Hershel 'Woody' Williams (ESB 4) is at anchor in the Chesapeake Bay, Sept. 15, 2019 during mine countermeasure equipment testing. (U.S. Navy photo by Bill Mesta/Released)

US Navy lays keel for the 4th ESB, the Future USS John L. Canley

The keel for the future USS John L. Canley (ESB 6), the Navy’s fourth Expeditionary Sea Base (ESB), was laid at General Dynamics National Steel and Shipbuilding Company (GD-NASSCO) shipyard in San Diego on April 30.

Naval News Staff 04 May 2022

NAVSEA press release

The ship is named for Medal of Honor Recipient Marine Corps Sergeant Major (Retired) John L. Canley.

Canley was awarded the nation’s highest honor 50 years after his actions serving as Company Gunnery Sergeant, Company A, First Battalion, First Marines, First Marine Division in the Republic of Vietnam during the Battle of Hue City.

“Sergeant Major Canley’s story is one of service, honor, and commitment. All those who serve aboard his namesake ship will carry on his distinguished legacy. These mobile, modular sea base ships are optimized to support the needs of our Sailors and Marines while providing critical access in the maritime domain.”


Tim Roberts, Strategic and Theater Sealift program manager, Program Executive Office, Ships

Expeditionary Sea Base ships are highly flexible platforms used across a broad range of military operations supporting multiple operational phases. Acting as a mobile sea base, they are a part of the critical access infrastructure that supports the deployment of forces and supplies to provide prepositioned equipment and sustainment with adaptable distribution capability.

US Navy lays keel for the 4th ESB, the Future USS John L. Canley
Retired U.S. Marine Corps Sgt.Maj John L. Canley, the 300th Marine Medal of Honor recipient, poses for a command board photo at the Pentagon in Arlington, Virginia, Oct. 18, 2018. (US Navy photo)

These ships support Aviation Mine Countermeasure and Special Operations Force missions. In addition to the flight deck, the ESB has a hangar with two aviation operating spots capable of handling MH-53E equivalent helicopters, accommodations, workspaces, and ordnance storage for embarked force, enhanced command, control, communications, computers, and intelligence (C4I). These ships support embarked force mission planning and execution and has a reconfigurable mission deck area to store embarked force equipment, including mine sleds and Rigid Hull Inflatable Boats (RHIBs).

In 2019, the Navy decided to commission all Expeditionary Sea Base ships to allow them to conduct a broader and more lethal mission set compared to original plans for them to operate with a USNS designation. A Navy O-6 commands ESBs and a hybrid-manned crew of military personnel and Military Sealift Command civilian mariners. This crew makeup provides combatant commanders with increased operational flexibility in employing the platform.

Construction of the future USS Robert E. Simanek (ESB 7) and the Navy’s John Lewis Class Fleet Replenishment Oilers (T-AO) are ongoing at GD-NASSCO.

ESB US Navy 2022-05-04
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