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United States' Portland Class Cruisers

Photos

CA-33 USS Portland on August 23, 1935:
CA-33 USS Portland on August 23, 1935
US Navy Photo, NH-97832
CA-33 USS Portland at Mare Island Navy Yard on May 16, 1943:
CA-33 USS Portland at Mare Island Navy Yard on May 16, 1943
US Navy Photo, 19-N-47582
CA-35 USS Indianapolis on May 1, 1943:
CA-35 USS Indianapolis on May 1, 1943
US Navy Photo, 19-N-47568
CA-35 USS Indianopolis on May 1, 1943:
CA-35 USS Indianopolis on May 1, 1943
US Navy Photo, 19-N-47570

Design

The Portland class was a hybrid of the Northampton and New Orleans classes.1 The USS Portland and USS Indianapolis were fitted out to be capable of being flagships.1

Originally it was planned to have five Portland class ships constructed.3

During construction it was found that the Portland class ships were underweight and additional armor was added.1

Aircraft

There were two catapults for launching the aircraft.1,4

Ships

CA-33 USS Portland

  • Manufacturer: Bethlehem at Quincy1,2,3,4
  • February 17, 1930: Laid down.1,3,4
  • May 21, 1932: Launched.1,2,3,4
  • February 23, 1933: Completed.1,3,4
  • 1933: Member of Cruiser Division 4, Scouting Force.1
  • 1934: Member of Cruiser Division 6.1
  • 1935: Member of Cruiser Division 5.1
  • 1936: Member of Cruiser Division 6.1
  • 1937 - 1940: Member of Cruiser Division 5.1
  • 1940 - 1945: Member of Cruiser Division 4.1
  • December 1941: Escorted USS Lexington to ferry aircraft to Midway Island.1 Member of Task Force 11 (TF11).1
  • Early 1942: Four 1.1" quad mounts and twelve 20 mm guns in total.1
  • May 1942: Battle of Coral Sea.1,2 Member of Task Force 17 (TF17).1 Rescued survivors of USS Lexington.1
  • June 1942: Battle of Midway.1,2
  • August 1942: Guadalcanal.1,2 Tulagi.1,2 Member of Task Force 16 (TF16).1
  • August 1942: Battle of Eastern Solomons.1,2 Member of Task Force 61 (TF61).1
  • October 16, 1942: Battle of Santa Cruz.1,2 Member of Task Force 61 (TF61).1 Hit by non-exploding aerial torpedoes.1
  • November 1942: Escorted troops convoy from Noumea to Guadalcanal.1
  • November 13, 1942: Hit by torpedo.1 Sank IJN Yudachi.1
  • November 1942 - March 1943: Repairs at Mare Island Navy Yard.1
  • 1943, May 19433: Refit.1 Bridge made larger and aft superstructure reduced.1,2,3 Four 40 mm Bofors quad mounts and four 40 mm Bofors twin mounts replaced 1.1" quad mounts.1
  • March 1943: Aleutians.1 Bombarded Kiska.1
  • Late 1943: Marshall and Gilbert Islands.1,2
  • Kwajalein.2
  • Eniwetok.2
  • April 1944: Hollandia.1
  • Summer 1944: Refit at Mare Island Navy Yard.1
  • September 1944: Bombarded Peleliu.1,2
  • October 1944: Leyte.1,2 Battle of Surigao Straits.1 Mindoro.2
  • 1945: Lingayen Gulf.1,2 Corregidor.1
  • April 1945: Okinawa.1,2
  • September 1945: Accepted Japanese surrender at Truk.1

CA-35 USS Indianapolis

  • Manufacturer: New York Shipbuilding1,2,3
  • March 31, 1930: Laid down.1,3
  • November 7, 1931: Launched.1,2,3
  • November 15, 1932: Completed.1,3
  • November 1933: Flagship of Scouting Force.1
  • December 7, 1941: Member of Task Force 13 (TF13).1
  • December 13, 1941: Member of Task Force 11 (TF11).1
  • 1942: Escorted USS Lexington and USS Saratoga in South Pacific.1
  • April - July 1942: Refit at Mare Island Navy Yard.1
  • August 1942: Bombarded Kiska.1 Attu.2
  • Summer 1943, May 19433: Refit at Mare Island Navy Yard.1 Bridge made larger and superstructure reduced.1,2,3
  • October 1943: Flagship 5th Fleet.1
  • November 1943: Bombarded Tarawa and Makin.1
  • 1944: Bombarded Kwajalein.1,2 Eniwetok.2
  • 1944: Refit.1 Starboard catapult removed.1
  • Marianas.2
  • Saipan.1
  • Palau.2
  • October 1944: Battle of Philippine Sea.1
  • Tinian.1
  • Guam.1
  • November 1944 - January 1945: Refit at Mare Island Navy Yard.1
  • February 1945: Iwo Jima.1,2
  • Escorted carriers on strikes on Japanese Islands.1
  • March 31, 1945: Hit by Kamikaze off Okinawa.1,2
  • June - July 1945: Repairs at Mare Island Navy Yard.1
  • July 26, 1945: Arrived at Tinian with components of first atomic bomb.1
  • July 28, 1945: Sailed from Guam to Leyte.1
  • July 29, 19452,3, July 30, 1945: Sunk.1,2,3 Hit by three torpedoes from I 58.1 Not reported lost for several days.1

Specifications

  Portland class
Crew 8071,3, 1,1502
Displacement 10,258 tons1
Displacement - Loaded 12,775 tons1
Physical Characteristics  
Length 610'1,3, 610' 3"2
185.93 m1,3
Length - Waterline 592'1,2,3
180.44 m1,3
Length - Between Perpendiculars  
Beam 66'1,3, 66' 3"2
20.12 m1,3
Draft / Height 17' 3"2, 21'1,3
6.4 m1,3
Performance  
Speed 32.5 knots1,3, 32.7 knots2
Range at 15 knots 10,000 nautical miles1,3
Armament 8" triple turrets1,2, 8" L/55 triple turrets3: 31,2,3
Anti-Aircraft 5"1,2, 5" L/253: 81,2,3
0.5"3: 83
Aircraft 32, 41,3
Armor  
Barbettes 1.5"3
Deck 2.5"1,3
Belt - Machinery 3"1
Magazines 5.75"1,2
Turrets  
Turrets - Front 2.5"3
Turrets - Rear 0.75"3
Turrets - Side 0.75"3
Turrets - Top 2"3
Engines  
Boilers Yarrow: 81,3
Shafts 41,2,3
Turbines Parsons geared1,3
HP 107,0001,2,3
Oil 1,417 tons - 2,125 tons3, 2,125 tons1
  Portland
Crew 876 - 1,2004
Displacement 9,800 tons2,4
Displacement - Loaded  
Physical Characteristics  
Length 640' 3"4
Length - Waterline 582'4
Length - Between Perpendiculars  
Beam 66'4
Draft / Height 17' 6"4
Performance  
Speed 32.7 knots4
Range at 15 knots  
Armament 8" L/554: 94
Anti-Aircraft 5" L/254: 84
40 mm4: 244
20 mm4: 164
Aircraft 44
Armor  
Deck 2" + 2"4
Belt - Main 3" - 4"4
Turrets 1.5" - 3"4
Engines  
Boilers Yarrow: 84
Shafts 44
Turbines Parsons geared4
HP 107,0004
Oil 1,600 tons4
  Indianapolis
Crew - Fleet Flagship 9173
Displacement 9,950 tons2, 10,258 tons3
Displacement - Loaded 12,755 tons3
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range at 15 knots  
Armament  
Anti-Aircraft  
Aircraft  
Armor  
Deck  
Belt - Machinery  
Magazines - Side  
Turrets  
Engines  
Boilers  
Shafts  
Turbines  
HP  
Oil  

Sources:

  1. Cruisers of World War Two An International Encyclopedia, M. J. Whitley, 1995
  2. US Warships of World War 2, Paul H. Silverstone, 1965
  3. Conway's All the World's Fighting Ships 1922-1946, Robert Gardiner, 1987
  4. Janes' Fighting Ships of World War II, 1989
20th Century American Military History Crucial Site