Lewis and Clark Class T-AKE dry cargo/ammunition ships are 210 meters (689 feet) in length and 32.2 meters (105.6 feet) in beam, with a design draft of 9.12 meters (29.9 feet). They displace 41,000 tons, and the ships can carry almost 7,000 metric tons of dry cargo and ammunition and 23,500 barrels of marine diesel fuel. The specifications demanded that the transfer rates for ammunition and stores must be at least equal to those of the AOE-6 Class. Maximum speed is slower, however, at around 20 knots of burst speed.
The T-AKEs will provide a 2-product (ammunition; and combat stores – including dry stores, frozen and chilled products, spare parts, and consumables that may include drinkable water) shuttle ship replacement for US Military Sealift Command’s aging Combat Store (T-AFS 1 Mars Class) and Ammunition (T-AE 26 Kilauea Class) shuttle ships. They are designed to be fully inter-operable with all US Navy and North Atlantic Treaty organization ships capable of underway replenishment, using standard US Navy Underway Replenishment (UNREP) equipment, or improved systems developed by industry.
ASRS test
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As one example, the US Navy is testing the Automated Storage and Retrieval System (ASRS), an automatic shipboard storeroom system that can be configured to store Navy-standard pallets, Joint Modular Intermodal Containers, or any other packaging container, offering faster performance, less work, and fully selective offloading. ASRS is intended to be a low-maintenance system that can operate in Sea State 5 (waves up to 7 feet, just under Small Craft Advisory), and survive to Sea Sate 9 (hurricane force winds and/or waves well over 14m/45 feet, “hey isn’t that Laird Hamilton out there?” conditions). With their single propulsion screw (mariners do not call them “propellers”) and single rudder, however, mechanical problems can become disabling more quickly than is the case for multiple screw or multiple rudder designs.
T-AKE ships are the US Navy’s first full-size all-electric ships, with diesel-electric generation that can be used for propulsion or for internal systems. The use of electric drive creates more internal redundancy in the event of damage. It also eliminates the need for drive shaft and reduction gears, which brings benefits to the ship’s internal space and makes for a quieter ship that’s harder to find using sonar. The ship class’ 4 Fairbanks Morse/MAN B&W 9L and 8L 48/60 diesel generators can generate up to 35.7 MW of power for use around the ship, compared to just 7.5 MW of power generated by the DDG-51 AEGIS destroyers to run internal machinery and combat systems.
SA330 from T-AKE 1
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T-AKE ships have a crew of 124 CIVMARs – civilian mariners who function under Secretary of the Navy instructions, and are Excepted Service employees of the US government. Military Sealift Command’s Naval Fleet Auxiliary Force serves as their program manager, but the ships are assigned to Fleet Forces Command. As such, these ships are given the USNS (name) designation and “placed in service,” unlike Navy warships which are given the USS (name) designation and commissioned. The T-AKE’s military detachment is 11 Navy sailors, who provide operational support and supply coordination.
Another effect of this CIVMAR difference can be seen in the ship’s air assets. T-AKE ships are capable of landing, fueling and maintaining up to 2 utility helicopters like the
CH-46D Sea Knight or
MH-60S Knight Hawk, with hangar space for 2 machines. In practice, however, they do not carry US Navy helicopters. Instead, they carry contracted Eurocopter SA330 Puma medium helicopters, which are used to help transfer personnel and cargo in VERTREP (Vertical Replenishment) operations. Other Navy helicopters may land on T-AKE ships and assist, of course, but they are not part of the T-AKE ship’s native complement.
USS George Washington
& USNS Carl Brashear
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As noted below, the initial October 2001 contract called for the design and construction of the lead ship and the 1st follow ship, with additional follow-on ships included as contract options. At the time, the total cost if all options were exercised and 11 ships were built was projected at $3.75 billion (presum