Serving as flagship for Maritime Prepositioning Ship Squadron (MPSRON) 3, USNS 1ST LT JACK LUMMUS is the fourth ship in the 2ND LT JOHN P. BOBO - class of Cargo Ships. The ship carries a full range of Marine Corps cargo, enough cargo to support a Marine Air Ground Task Force for 30 days. Additionally, the 1ST LT JACK LUMMUS has lift-on/lift-off capabilities as well as roll-on/roll-off capabilities. Navy lighterage carried onboard consists of causeways, both powered and unpowered, and small boats to move them around.

The 1ST LT JACK LUMMUS usually participates in at least one major Maritime Prepositioning Force exercise per year. Since 1985, the MV 1ST LT JACK LUMMUS had been under long-term lease to Military Sealift Command from American Overseas Marine. On January 16, 2007, the Military Sealift Command purchased the ship, making her USNS 1ST LT JACK LUMMUS.

The military detachment aboard the LUMMUS consists of 18 people. These are the Commodore, the Chief of Staff Officer, the Engineering Officer, the Operations Officer, the Suppy Officer, 1 Storekeeper, 1 Yeoman, 3 Electrics Technicians, 1 Radioman Chief, and 7 to 8 Radioman or Information Technicians respectively.

General Characteristics: Keel laid: June 1984

Christened: February 22, 1986

Delivered: March 6, 1986

Builder: General Dynamics, Quincy, Massachusetts

Propulsion system: 2 Stork-Wartsilia Werkspoor 16TM410 diesels; 27,000 hp sustained; 1 shaft, bow thruster; 1,000 hp

Propellers: one

Length: 672.6 feet (205 meters)

Beam: 106 feet (32.3 meters)

Draft: 29.5 feet (9 meters)

Displacement: approx. 44,330 tons full load

Speed: 18 knots

Aircraft: helicopter platform only (certified to land up to CH-53E helicopters)

Armament: none

Capacity:

162,500 sq. ft. vehicle

1,605,000 gallons petroleum

81,700 gallons water

522 TEU

Crew: 18 US Navy personnel, 30 civilians and 25 civilian maintenance

Homeport: not assigned