USS Portsmouth (CL-102)

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For other ships with the same name, see USS Portsmouth.
USS Portsmouth
USS Portsmouth (April 1948)
History
United States
NamePortsmouth
NamesakeCity of Portsmouth, New Hampshire
BuilderNewport News Shipbuilding & Dry Dock Company, Newport News, Virginia
Laid down28 June 1943
Launched20 September 1944
Commissioned25 June 1945
Decommissioned15 June 1949
Stricken15 January 1971
FateSold for scrap on 26 February 1974
General characteristics
Class and type Cleveland-class light cruiser
Displacement
  • Standard: 11,744 long tons (11,932 t)
  • Full load: 14,131 long tons (14,358 t)
Length610 ft 1 in (185.95 m)
Beam66 ft 4 in (20.22 m)
Draft24 ft 6 in (7.47 m)
Installed power
Propulsion
Speed32.5 kn (60.2 km/h; 37.4 mph)
Range11,000 nmi (20,000 km; 13,000 mi) at 15 kn (28 km/h; 17 mph)
Complement1,285 officers and enlisted
Armament
Armor
Aircraft carried4 × floatplanes
Aviation facilities2 × stern catapults

USS Portsmouth (CL–102) was a Cleveland-class light cruiser of the United States Navy, the third ship to carry the name.

Portsmouth was laid down by the Newport News Shipbuilding & Dry Dock Company, Newport News, Virginia, on 28 June 1943; launched on 20 September 1944; sponsored by Mrs. Marian M. Dale and Mrs. Sarah B. Leigh, and commissioned 25 June 1945, Captain Heber B. Brumbaugh in command.

Design[]

Main article: Cleveland-class cruiser

Portsmouth was 610 feet 1 inch (186 m) long overall and had a beam of 66 ft 4 in (20.22 m) and a draft of 24 ft 6 in (7.47 m). Her standard displacement amounted to 11,744 long tons (11,932 t) and increased to 14,131 long tons (14,358 t) at full load. The ship was powered by four General Electric steam turbines, each driving one propeller shaft, using steam provided by four oil-fired Babcock & Wilcox boilers. Rated at 100,000 shaft horsepower (75,000 kW), the turbines were intended to give a top speed of 32.5 knots (60.2 km/h; 37.4 mph). Her crew numbered 1285 officers and enlisted men.[1]

The ship was armed with a main battery of twelve 6 in /47 caliber Mark 16 guns[a] in four 3-gun turrets on the centerline. Two were placed forward in a superfiring pair; the other two turrets were placed aft of the superstructure in another superfiring pair. The secondary battery consisted of twelve 5 in (127 mm) /38 caliber dual purpose guns mounted in twin turrets. Two of these were placed on the centerline, one directly behind the forward main turrets and the other just forward of the aft turrets. Two more were placed abreast of the conning tower and the other pair on either side of the aft superstructure. Anti-aircraft defense consisted of twenty-eight Bofors 40 mm (1.6 in) guns in four quadruple and six double mounts and ten Oerlikon 20 mm (0.79 in) guns in single mounts.[1]

The ship's belt armor ranged in thickness from 3.5 to 5 in (89 to 127 mm), with the thicker section amidships where it protected the ammunition magazines and propulsion machinery spaces. Her deck armor was 2 in (51 mm) thick. The main battery turrets were protected with 6.5 in (170 mm) faces and 3 in (76 mm) sides and tops, and they were supported by barbettes 6 inches thick. Portsmouth's conning tower had 5-inch sides.[1]

Service history[]

Portsmouth was laid down at the Newport News Shipbuilding & Dry Dock Company in Newport News, Virginia on 28 June 1943. She was launched on 20 September 1944 and was commissioned on 25 June 1945.[2] The ship then embarked on her initial shakedown cruise that took Portsmouth as far south as Cuba. She was thereafter based in Norfolk, Virginia; by that time, World War II had ended, precluding any significant wartime service. The ship was assigned to the Operational Development Force, serving with that unit into 1946. Portsmouth embarked on a goodwill cruise to visit various ports in Africa, including Capetown, South Africa; Lagos, Nigeria; Freetown, Sierra Leone; Monrovia, Liberia; Dakar, French Senegal; and Casablanca, French Morocco. From there, she continued into the Mediterranean Sea to visit Naples and Palermo, Italy. She thereafter returned to the United States.[3]

The ship began another cruise to the Mediterranean on 25 November. She reached Naples on 7 December and then entered the Adriatic Sea, steaming as far north as Trieste by the end of December. She patrolled the area through February 1947, during a period of tension in the region in the aftermath of World War II. In March, she spent two weeks back in Trieste, and in April, she left the Mediterranean for home. A third Mediterranean cruise began in November and concluded with her arrival in Boston on 11 March 1948. She underwent an overhaul there and then took part in routine training operations off the East Coast of the United States. During this period, she also conducted training cruises for United States Navy Reserve personnel to the Caribbean. She sailed to the Philadelphia Naval Shipyard for a final overhaul in preparation of being reduced to the reserve fleet. She was decommissioned on 15 June 1949 and allocated to the Atlantic Reserve Fleet. She remained in the Navy's inventory through 1970.[3] She was stricken from the naval register on 1 December that year and subsequently broken up.[2]

Footnotes[]

Notes[]

  1. ^ /47 refers to the length of the gun in terms of calibers. A /47 gun is 47 times long as it is in bore diameter.

Citations[]

  1. ^ a b c Friedman, p. 119.
  2. ^ a b Friedman, p. 120.
  3. ^ a b DANFS.

References[]

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

  • Friedman, Norman (1980). "United States of America". In Gardiner, Robert & Chesneau, Roger (eds.). Conway's All the World's Fighting Ships, 1922–1946. Annapolis: Naval Institute Press. pp. 86–166. ISBN 978-0-87021-913-9.
  • "Portsmouth III (CL-102)". Dictionary of American Naval Fighting Ships. Navy Department, Naval History and Heritage Command. 24 August 2015. Retrieved 1 February 2022.

External links[]

  • Photo gallery of USS Portsmouth (CL-102) at NavSource Naval History
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