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Portland-class cruiser

A large, gray warship at sea
USS Indianapolis in 1945
Class overview
Name: Portland class
Operators: Flag of the United States (1912-1959).svg United States Navy
Preceded by: Northampton class
Succeeded by: New Orleans class
Completed: 2
Lost: 1
Retired: 1
General characteristics
Type: Heavy cruiser
Displacement: 9,950–9,800 long tons (10,110–9,960 t)
Length: 592 ft (180 m) (waterline); 610 ft 3 in (186.00 m) (overall)
Beam: 66 ft 3 in (20.19 m)
Draft: 17 ft 3 in (5.26 m) (mean); 23 ft (7.0 m) (maximum)
Propulsion:
  • 4 × Parsons geared turbines,
  • 8 × White-Forster boilers,
  • 4 × shafts,
  • 107,000 ihp (79,800 kW)
Speed: 32.7 kn (37.6 mph; 60.6 km/h)
Range: 13,000 nmi (14,960 mi; 24,080 km) at 15 kn (17 mph; 28 km/h)
Capacity: Fuel oil: 1,500 tons
Complement: 807 (peacetime)
Armament:
Armor:
Aircraft carried: 3 × SOC Seagull scout-observation seaplanes
Aviation facilities: 2 × catapults

The Portland class of heavy cruisers was a class of ships designed and constructed by the United States Navy in 1930. The two ships of the class, Portland and Indianapolis, saw extensive service during the Pacific War in World War II.

Designed as a modification over the previous Northampton-class cruiser, the Portland class displaced just under 10,000 long tons (10,000 t) and featured heavier armor and armament than previous cruisers. Featuring 8"/55 caliber guns and designed to function as fleet flagships, the Portland class were intended to fix problems with armament and armor that had been a weakness of preceding U.S. cruisers. These designs were carried over to the following New Orleans class, of which several Portland cruisers were converted to mid-construction.

Portland served in a large number of engagements including the Battle of Coral Sea, the Battle of Midway and the Guadalcanal Campaign, where she was severely damaged but nonetheless able to return to service. She later fought in the Battle of Leyte Gulf and the Battle of Okinawa. Indianapolis served as a fleet flagship for much of the war and fought in the Battle of Philippine Sea and the Battle of Iwo Jima. On 30 July 1945, after transporting components for the nuclear weapons Little Boy and Fat Man from the United States, she was torpedoed by the Japanese submarine I-58. Due to a series of errors and miscommunications her loss was not discovered for several days, and only 316 of her 1,116 crew survived.


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Wikipedia

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