USS Merrimack (AO-37)

For other ships of the same name, see USS Merrimack.

USS Merrimack (AO-37)
Career
Name:	USS Merrimack
Ordered:	12 September 1940
Builder:	Bethlehem Sparrows Point Shipyard
Launched:	1 July 1941
Commissioned:	4 February 1942
Decommissioned:	20 December 1954
Honors and awards:	8 battle stars (World War II)
Fate:	Sold, 19 March 1982
General characteristics
Class & type:	Kennebec class oiler
Type:	MARAD T2
Tonnage:	15,910 DWT
Displacement:	21,077 tons
Length:	501 ft 8 in (152.91 m)
Beam:	68 ft (21 m)
Draft:	29 ft 8.5 in (9.055 m)
Depth:	37 ft (11 m)
Installed power:	12,000 shp (8,900 kW)
Propulsion:	geared steam turbine single screw
Speed:	16.5 knots (30.6 km/h)
Range:	8,000 nmi (15,000 km; 9,200 mi)
Capacity:	130,000 bbl (~18,000 t)
Complement:	214–247
Armament:	1 × 5"/38 caliber gun mounts 4 × 3"/50 caliber gun mounts 8 × 40 mm AA gun mounts 8 × 20 mm AA gun mounts 2 × depth charge projectors

USS Merrimack (AO-37) (ex-Caddo) was one of five Kennebec-class fleet oilers (also known as a type T2 tanker) built during World War II for service in the United States Navy, named after the Merrimack River.

The Merrimack was laid down as Caddo under Maritime Commission contract on 12 September 1940 by Bethlehem Steel Co., Sparrows Point, Maryland. It was launched on 1 July 1941 and acquired by the U.S. Navy from Socony-Vacuum Oil Company (later Mobil Oil) on 31 December 1941. She was renamed Merrimack on 9 January 1942, and commissioned 4 February 1942, Capt. William E. Hilbert in command.

Service history

Assigned to the Atlantic Fleet, the new fleet oiler spent the next two and a half years steaming the Atlantic seaways carrying oil for Allied ships from Argentia, Newfoundland to Montevideo, Uruguay, and from ports along the U.S. east coast to staging areas in the British Isles and the Mediterranean. Her primary duty was fueling the escorts which protected Allied convoys from German U-boats.

Merrimack's most memorable crossing began on 23 October 1942 from Hampton Roads when she sailed with the Southern Attack Group of the Western Naval Task Force for "Operation Torch", the invasion of North Africa. Twice during the passage she refueled the ships of the task force. A heavy storm broke on 4 November threatening the landings, but Admiral H. Kent Hewitt kept to the original plan. Its mission was to capture the harbor at Safi, Morocco, to cut off French forces in southern Morocco, and to enable the landing of General Patton's tanks for operations against Casablanca.

For more than a year and a half after the landings in Morocco, Merrimack carried oil to support operations in North Africa, Sicily, Italy, and France. On her transatlantic voyages, besides oil, she carried passengers and a wide variety of equipment including PT boats, patrol craft, and aircraft. While steaming toward Casablanca on 22 June 1943, she joined minesweeper Pilot (AM-104) in rescuing 113 survivors from the Lot, a French oiler that had been torpedoed.

Merrimack departed Norfolk, Virginia, on 14 October 1944 for the Panama Canal and Ulithi, arriving on 1 December. Allied forces were retaking the Philippines and preparing for operations even closer to the Japanese home islands. Merrimack joined the 3rd Fleet's At-Sea Logistics Support Group to fuel the fast carrier task force. She began the new year supporting raids on Formosa on 3 and 4 January 1945. The U.S. carriers struck enemy airbases on Luzon, Philippines, on 6 and 7 January to help neutralize Japanese resistance to the invasion of that strategic island which began on the beaches of Lingayen Gulf on the 9th. Naval aircraft which she supported returned to Formosa on the 15th and hit targets along the China coast the following day. They again lashed out at Formosa on the 21st.

From 16 February through 2 March, Merrimack supported the ships covering the landings on Iwo Jima. During the fight for Okinawa, Merrimack alternated between fueling ships involved directly in the landings, and the aircraft carriers during raids to on the Japanese home islands.

After Okinawa was secured, the 3rd Fleet concentrated on operations against Japan itself. From 10 through 29 July 1945, Merrimack supported raids of overwhelming force on Japanese targets which hastened the end of the war. Following Japan's capitulation 15 August, Merrimack made several cruises between the west coast and the Far East bringing oil for ships supporting the occupation of Japan and operating along the coasts of China and Korea. She was assigned to Military Sea Transportation Service in October 1949, shortly before beginning pre-inactivation overhaul. Merrimack was decommissioned on 8 February 1950 and entered the Atlantic Reserve Fleet at Orange, Texas.

When North Korean forces invaded South Korea in 1950, Merrimack was recommissioned on 6 December 1950. Assigned to MSTS, the fleet oiler served the Atlantic Fleet, making periodic deployments to the Mediterranean until she was decommissioned on 20 December 1954, and entered the Pacific Reserve Fleet at San Diego. She was stricken from the Navy List on 4 February 1959, transferred to the Maritime Administration, and placed in the National Defense Reserve Fleet at Beaumont, Texas. The Merrimack was disposed of by MARAD exchange on 19 March 1982. It was sold to Eckhardt & Co. GmbH, Hamburg, for scrapping, and delivered on 29 March 1982 at Beaumont.

Honors and awards

Awards, Citations and Campaign Ribbons

Merrimack received eight battle stars for World War II service for the following campaigns:

Europe-Africa-Middle East Campaigns	Asiatic-Pacific Campaigns
North African occupation Algeria - Morocco landings, 9 to 11 November 1942	Luzon operation Formosa attacks, 3 to 4, 15 and 21 January 1945 Luzon attacks, 6 and 7 January 1945 China Coast attacks, 16 January 1945
	Iwo Jima operation Assault and occupation of Iwo Jima, 16 February to 2 March 1945
	Okinawa Gunto operation 5th and 3d Fleet raids in support of Okinawa Gunto operation, 26 March to 3 June 1945 Assault and occupation of Okinawa Gunto, 4 to 21 June 1945
	3rd Fleet operations against Japan,, 10 to 29 July 1945

References

• This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.

External links

• Photo gallery of USS Merrimack at NavSource Naval History
• Wildenberg, Thomas (1996). Gray Steel and Black Oil: Fast Tankers and Replenishment at Sea in the U.S. Navy, 1912-1995. Annapolis, Maryland: Naval Institute Press. http://www.ibiblio.org/hyperwar/USN/GSBO/index.html. Retrieved 2009-04-28.