Lewis and Clark-class dry cargo ship

Lewis and Clark-class dry cargo ship. The Lewis and Clark class is a group of fourteen dry cargo ships operated by the United States Navy's Military Sealift Command (MSC). Designed as Combined Fleet Auxiliaries, they provide crucial logistical support by delivering ammunition, food, fuel, and other supplies to U.S. Navy combat ships at sea. The class is named for the famed Lewis and Clark Expedition, with the lead ship honoring Meriwether Lewis and William Clark.

Design and specifications

The class was designed by the San Diego-based National Steel and Shipbuilding Company (NASSCO) to replace aging Sacramento-class and Mars-class auxiliaries. Each vessel features a highly automated Cargo hold system and can carry over 6,600 tons of munitions, provisions, and spare parts, alongside nearly 2,400 tons of diesel fuel and aviation fuel. Propulsion is provided by a single MAN Diesel engine driving a Controllable-pitch propeller, enabling a sustained speed of 20 knots. The ships include a large flight deck and hangar capable of supporting heavy-lift helicopters like the CH-53E Super Stallion and the V-22 Osprey, facilitating Vertical replenishment.

Construction and service history

Construction of the class, under the designation T-AKE, began at the NASSCO shipyard in San Diego in 2005. The lead ship, USNS Lewis and Clark (T-AKE-1), was delivered to the Military Sealift Command in 2006. All fourteen ships were commissioned into service between 2006 and 2012, forming the backbone of the Navy's modern underway replenishment capability. These vessels are crewed by civilian merchant mariners employed by MSC, with a small U.S. Navy detachment to handle weapons systems and communications. They operate globally in support of Carrier Strike Groups and Amphibious Ready Groups.

Ships in class

The fourteen ships of the class are: USNS Lewis and Clark (T-AKE-1), USNS Sacagawea (T-AKE-2), USNS Alan Shepard (T-AKE-3), USNS Richard E. Byrd (T-AKE-4), USNS Robert E. Peary (T-AKE-5), USNS Amelia Earhart (T-AKE-6), USNS Carl Brashear (T-AKE-7), USNS Wally Schirra (T-AKE-8), USNS Matthew Perry (T-AKE-9), USNS Charles Drew (T-AKE-10), USNS Washington Chambers (T-AKE-11), USNS William McLean (T-AKE-12), USNS Medgar Evers (T-AKE-13), and USNS Cesar Chavez (T-AKE-14). Each ship is named for notable American explorers, pioneers, and innovators.

Operational role and capabilities

The primary mission is to conduct Underway replenishment (UNREP) and Vertical replenishment (VERTREP) for U.S. Navy fleets, significantly extending the operational reach and endurance of naval forces. They are equipped with multiple Standard tensioned replenishment alongside method (STREAM) stations and can transfer cargo while underway alongside aircraft carriers like the Nimitz-class and Gerald R. Ford-class. Their integrated cargo handling systems allow for the safe stowage and transfer of a wide variety of supplies, including sensitive ordnance for vessels such as the Arleigh Burke-class destroyers and Ticonderoga-class cruisers.

Notable deployments and operations

Ships of the class have been deployed in support of major naval operations and exercises worldwide. They have provided sustained logistical support for the U.S. Fifth Fleet in the Persian Gulf and the U.S. Seventh Fleet in the Western Pacific. They routinely participate in exercises like RIMPAC and Operation Enduring Freedom. The USNS Carl Brashear (T-AKE-7) notably supported humanitarian missions following the 2011 tsunami in Japan, delivering critical relief supplies. Their presence is a constant in maintaining the global operational tempo of the United States Navy.

Category:Replenishment ships of the United States Category:Ship classes of the United States Navy Category:Military Sealift Command