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United States' Omaha Class Cruisers

Photos

CL-4 USS Omaha at New York Navy Yard on February 10, 1943:
CL-4 USS Omaha at New York Navy Yard on February 10, 1943
US Navy Photo, NH-97972
CL-4 USS Omaha at New York Navy Yard on February 10, 1943:
CL-4 USS Omaha at New York Navy Yard on February 10, 1943
US Navy Photo
CL-4 USS Omaha capturing the Odewald in the Central Atlantic:
CL-4 USS Omaha capturing the Odewald in the Central Atlantic
US Navy Photo, NH-49935
CL-5 USS Milwaukee in the 1930s:
CL-5 USS Milwaukee in the 1930s
US Navy Photo, NH-97979
CL-5 USS Milwaukee in New York in August 1943:
CL-5 USS Milwaukee in New York in August 1943
US Navy Photo, 19-N-51513
CL-6 USS Cincinnati in New York on March 22, 1944:
CL-6 USS Cincinnati in New York on March 22, 1944
US Navy Photo, 19-N-62459
CL-6 USS Cincinnati in New York on March 22, 1944:
CL-6 USS Cincinnati in New York on March 22, 1944
US Navy Photo, 80-G-231250
CL-7 USS Raleigh in San Diego on October 21, 1933:
CL-7 USS Raleigh in San Diego on October 21, 1933
US Navy Photo, NH-6521
CL-7 USS Raleigh at Mare Island Navy Yard after repairs on July 6, 1942:
CL-7 USS Raleigh at Mare Island Navy Yard after repairs on July 6, 1942

CL-8 USS Detroit at Puget Sound Navy Yard on April 11, 1944:
CL-8 USS Detroit at Puget Sound Navy Yard on April 11, 1944
US Navy Photo, 19-N-63759
CL-8 USS Detroit at Port Angeles, Washington on April 14, 1944:
CL-8 USS Detroit at Port Angeles, Washington on April 14, 1944
US Navy Photo, 19-N-63828
CL-9 USS Richmond during trials off Philadelphia on May 11, 1923:
CL-9 USS Richmond during trials off Philadelphia on May 11, 1923
Library of Congress, GGBAin-36279
CL-9 USS Richmond in Puget Sound on June 24, 1944:
CL-9 USS Richmond in Puget Sound on June 24, 1944
US Navy Photo, 19-N-67552
CL-10 USS Concord at Balboa in the Panama Canal Zone on January 9, 1943:
CL-10 USS Concord at Balboa in the Panama Canal Zone on January 9, 1943
US Army Signal Corps, USAC-627
CL-10 USS Concord in the Panama Canal Zone on March 19, 1943:
CL-10 USS Concord in the Panama Canal Zone on March 19, 1943
US Navy Photo, 19-N-42165
CL-11 USS Trenton in the Gulf of Panama on May 11, 1943:
CL-11 USS Trenton in the Gulf of Panama on May 11, 1943
US Navy Photo, 19-N-4436
CL-11 USS Trenton in San Francisco on August 11, 1944:
CL-11 USS Trenton in San Francisco on August 11, 1944
US Navy Photo, 19-N-91697
CL-12 USS Marblehead at Tjilatjap, Java after being damaged by Japanese bombers:
CL-12 USS Marblehead at Tjilatjap, Java after being damaged by Japanese bombers
US Navy Photo, 80-G-237438
CL-12 USS Marblehead undergoing repairs at New York Navy Yard in 1942:
CL-12 USS Marblehead undergoing repairs at New York Navy Yard in 1942
US Navy Photo, 80-G254938
CL-13 USS Memphis launching a O2U floatplane on May 10, 1933:
CL-13 USS Memphis launching a O2U floatplane on May 10, 1933
US Navy Photo, 80-G-455864
CL-13 USS Memphis in San Diego on January 10, 1935:
CL-13 USS Memphis in San Diego on January 10, 1935
US Navy Photo, NH-64627

Design

The Omaha class were designed to be the 1917 Scout.1 It was to carry ten 6" guns, two torpedo tubes, and mines.1 Due to weight restrictions every weight saving measure had to be used.1

Aircraft

The Omaha class has one catapult on each side.1,4 There was no hanger.1

Starting in 1935 the Vought floatplanes were replaced by Curtiss SOC Seagulls.1

Starting in 1940 the Vought OS2U Kingfisher was the main aircraft used.1

Engines

There were four boiler rooms.1 There were two boiler rooms forward, then an engine room, then two more boiler rooms aft.1

Ships

CL-4 USS Omaha

  • Manufacturer: Seattle1, Todd in Tacoma2,4
  • December 6, 1918: Laid down.1,4
  • December 14, 1920: Launched.1,2,3,4
  • February 19234, February 24, 1923: Completed.1,4
  • February 1923: Flagship of Destroyers in the Atlantic.1
  • 1939: Member of Cruiser Division 2, Task Force 3.1 Took part in Neutrality Patrols.1
  • 1942: Blockade and raider patrols in Central and South Atlantic.1
  • November 6, 1942: Captured blockade runner Odenwald off Brazil.1
  • January 1944: Member of Task Force 41.1 Operated from Recife, Brazil.1
  • January 4, 1944: Sunk blockade runner Rio Grande with destroyer USS Jouett.1
  • January 5, 1944: Helped scuttle blockade runner Burgenland.1
  • Mid 1944: Moved to Task Force 86 "Sitka", in the Mediterranean, to support invasion of southern France.1
  • August 1944: Moved to South Atlantic.1

CL-5 USS Milwaukee

  • Manufacturer: Seattle1, Todd in Tacoma2,4
  • December 13, 1918: Laid down.1,4
  • March 24, 1921: Launched.1,2,3,4
  • June 19234, June 20, 1923: Completed.1,4
  • 1928: Member of Cruiser Division 2, Asiatic Fleet.1
  • 1933 - 1940: Member of Cruiser Division 3, Battle Fleet in the Pacific.1
  • 1940: Member of Cruiser Division 2.1 Conducting Atlantic Neutrality Patrols.1
  • December 1941: Ocean Patrol in Caribbean.1
  • 1942: Member of Task Force 41 based in Recife.1 Escorted convoys.1
  • February 1944: Moved to New York.1 Convoy escort in North Atlantic.1
  • March 1944: Escorted convoy JW58 to Soviet Union.1
  • 19443, April 20, 1944: Given to Soviet Union in place of Italian warships temporarily until the Italian ships could be transferred.1,2,3 Became Murmansk.1,2

CL-6 USS Cincinnati

  • Manufacturer: Seattle.1, Todd in Tacoma2,4
  • May 15, 1920: Laid down.1,4
  • May 23, 1921: Launched.1,2,3,4
  • December 19234, January 1, 1924: Completed.1,4
  • 1924: Member of Cruiser Division 2, Atlantic Fleet.1
  • 1927: Member of Cruiser Division 3, Asiatic Fleet.1
  • 1928: Moved to Atlantic.1
  • 1932: Member of Cruiser Division 3, Battle Fleet in the Pacific.1
  • 1941 - 1945: Member of Cruiser Division 2, Atlantic Fleet.1 With Task Force 41 based at Recife.1
  • August 1944: Supported landings in Southern France.1

CL-7 USS Raleigh

  • Manufacturer: Bethlehem at Quincy1,2,4
  • August 16, 1920: Laid down.1,4
  • October 25, 1922: Launched.1,2,3,4
  • February 19244, February 6, 1924: Completed.1,4
  • 1927: Landed troops in Nicaragua.1
  • 1928: Cruise to Europe.1
  • 1936 - 1937?: Patrols off Spain during Civil War.1
  • Summer 1938: Flagship of Destroyers, Pacific Fleet.1 Based at Pearl Harbor.1
  • December 7, 1941: Heavily damaged by torpedoes and one bomb near miss.1,2
  • December 1941 - July 1942: Repairs.1
  • July 1942 - March 1944: Member of Southern Covering Force in Aleutians.1
  • February 18 - 19, 1943: Bombarded Attu.1
  • May 1943: Member of TG16.6.1 Supported Attu landings.1
  • August 1943: Bombarded Kiska.1
  • February 1944: Bombarded Paramushiro, Kuriles.1
  • January 1945: Bombarded Kuriles.1

CL-8 USS Detroit

  • Manufacturer: Bethlehem at Quincy1,2,4
  • November 10, 1920: Laid down.1,4
  • June 20, 1922, June 29, 19222,3,4: Launched.1,2,3,4
  • July 19234, July 21, 1923: Completed.1,4
  • 1923: Member of Cruiser Division 3.1
  • 1927: Sent to Nicaragua.1
  • June 1927: Flagship of Commander Naval Forces Europe.1
  • Late 1930s: Flagship Destroyer Flotilla, Battle Force.1
  • 1939 - May 1942: Flagship of Destroyer Squadron 2 in Pacific.1
  • December 7, 1941: At Pearl Harbor.1
  • May 1942 - 1945: Member of Cruiser Division 1.1
  • November 1942 - June 1944: Flagship of Task Force 8.6 in the Aleutians.1
  • February 18 - 19, 1943: Bombarded Attu.1
  • August 1943: Bombarded Kiska.1
  • February 1944: Bombarded Kuriles.1
  • August 1944 - December 1944: Flagship of South East Pacific Fleet.1 Based at Balboa.1
  • January 16, 1945: Sailed to Ulithi to be Flagship of Replenishment Group, 5th Fleet.1
  • 1945: Refit.1 Forward 6" gun replaced by two 40 mm twin mounts.1
  • September 1, 1945: In Tokyo Bay for Japanese surrender.1

CL-9 USS Richmond

  • Manufacturer: Cramp1,2, William Cramp and Sons4
  • February 16, 1920: Laid down.1,4
  • September 29, 1921: Launched.1,2,3,4
  • June 19234, July 2, 1923: Completed.1,4
  • 1923: Cruised to Europe, Africa, and South America.1
  • 1925: Flagship of Light Cruiser Division with Scouting Force.1
  • 1927: China Station.1
  • 1928 - 1934: East coast.1
  • 1934 - 1937: West coast.1 Flagship of Submarine Force.1
  • 1940: Moved to Pearl Harbor.1 Flagship Cruiser Division 3.1
  • December 1940: Neutrality Patrol off west coasts of North and South America.1
  • 1941 - 1943: Convoy escort in Pacific.1
  • 1943: Flagship TG16.6 in Aleutians.1
  • March 26, 1943: Battle of Komandorski Islands.1
  • February 18 - 19, 1943: Bombarded Attu.1
  • August 1943: Bombarded Kiska.1
  • February 1944: Bombarded Kuriles.1
  • June - July 1945: Raids on Japanese convoys in sea of Okhotsk.1
  • September 1945: Occupation of Japan.1

CL-10 USS Concord

  • Manufacturer: Cramp1,2, William Cramp and Sons4
  • March 29, 1920: Laid down.1,4
  • December 15, 1921: Launched.1,2,3,4
  • November 19234, November 3, 1923: Completed.1,4
  • 1925 - 1931: Flagship of Atlantic Destroyer Flotillas.1
  • 1931: Flagship of Cruiser Division 3, Scouting Force.1
  • 1941 - 1944: South East Pacific.1
  • April 1944: Flagship of Task Force 94 in the Aleutians.1
  • September 1945: Occupation of Japan.1

CL-11 USS Trenton

  • Manufacturer: Cramp1,2, William Cramp and Sons4
  • August 18, 1920: Laid down.1,4
  • April 16, 1923: Launched.1,2,3,4
  • April 19244, April 19, 1924: Completed.1,4
  • 1924 - 1939: Flagship Cruiser Division 2.1
  • 1928: Nicaragua operations.1
  • 1939: Member of Cruiser Division 3, Battle Force.1
  • 1942 - 1944: South Pacific.1
  • September 1944 - September 1945: Aleutians.1

CL-12 USS Marblehead

  • Manufacturer: Cramp1,2, William Cramp and Sons4
  • August 4, 1920: Laid down.1,4
  • October 9, 1923: Launched.1,2,3,4
  • September 19244, September 8, 1924: Comleted.1,4
  • 1924: Cruise to Great Britain and Mediterranean.1
  • 1925: Cruise to Australia.1
  • 1927 - 1928: Supported operations on Yangtze river and Nicaragua.1
  • November 12, 1935: Curtiss SOC Seagulls added.1
  • January 1938: Based at Cavite, Philippines.1
  • December 1941: Escorted Allied convoys in East Indies.1
  • January 1942: Engine trouble prevented participation in attack on Japanese invasion forces off Balikpapan.1
  • February 1942: Member of ABDA force.1 Attack on Japanese invasion forces off Balikpapan.1 Hit by two bombs.1 Badly damaged but made it to South Africa.1
  • February - mid April 1942: Repairs.1
  • August 1944: Supported invasion of Southern France with Task Force 87.1

CL-13 USS Memphis

  • Manufacturer: Cramp1,2, William Cramp and Sons4
  • October 14, 1920: Laid down.1,4
  • April 17, 1924: Launched.1,2,3,4
  • January 19254, February 4, 1925: Completed.1,4
  • 1925: Member of Cruiser Division 3, Atlantic Fleet.1
  • 1927: Member of Cruiser Division 2, Scouting Force.1
  • 1939: Flagship of Aircraft Scouting Forces.1
  • 1929 - 1941: Based in Alaska.1
  • April 1941: Neutrality Patrols.1
  • December 1941: South Atlantic based at Recife.1
  • January 1945: Flagship Commander United States Navy Forces in Europe.1

Specifications

  Omaha class
Crew 4584, 8001,2
Displacement 7,050 tons1,2,3,4
Displacement - Loaded 9,150 tons1
Physical Characteristics  
Length 555' 6"1,2,4
169.3 m1
Length - Waterline 550'1,2,4
167.6 m1
Length - Between Perpendiculars  
Beam 55' 4"1,4, 55' 6"2
16.85 m1
Draft / Height 13' 6"1,2,4
4.11 m1
Performance  
Speed 34 knots2, 35 knots4
Range at 10 knots 8,460 nautical miles1
Range at 15 knots 10,000 nautical miles4
Range at 20 knots 7,200 nautical miles4
Armament 6"2, 6" L/53 Mk 12 twin turrets1: 21,2
6"2, 6" L/53 Mk 121,4: 81,2,4
Anti-Aircraft 3"2, 3" L/501,4: 21, 82,4
Machine Guns4 84
Saluting Guns 3 pdr4: 24
Aircraft 21,2,4
Mines 2241
Torpedo Tubes 21"1,2,4: 2 mounts 3 tubes each1,2,4
Armor  
Deck 1.5"1,4
Main Belt 3"1,4
Turrets  
Engines  
Boilers  
Shafts 41,2,4
Turbines Geared.2
HP 90,0001,2,4
Oil 1,852 tons1, 2,000 tons4
  CL-4 Omaha
Crew  
Displacement  
Displacement - Loaded  
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range  
Armament 6" twin mounts2: 22
6"2, 6" L/53 Mk XII4: 62, 124
3"2: 62
Anti-Aircraft  
Aircraft  
Torpedo Tubes  
Armor  
Deck  
Main Belt  
Turrets  
Engines  
Boilers Yarrow: 121,4
Shafts  
Turbines Westinghouse geared1,4
HP  
Oil  
  CL-5 Milwaukee
Crew  
Displacement  
Displacement - Loaded  
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range  
Armament 6" L/53 Mk XII4: 124
3"2: 62
Anti-Aircraft  
Aircraft  
Torpedo Tubes  
Armor  
Deck  
Main Belt  
Turrets  
Engines  
Boilers Yarrow: 121,4
Shafts  
Turbines Westinghouse geared1,4
HP  
Oil  
  CL-6 Cincinnati
Crew  
Displacement  
Displacement - Loaded  
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range  
Armament  
Anti-Aircraft  
Aircraft  
Torpedo Tubes  
Armor  
Deck  
Main Belt  
Turrets  
Engines  
Boilers Yarrow: 121,4
Shafts  
Turbines Westinghouse geared1,4
HP  
Oil  
  CL-7 Raleigh
Crew  
Displacement  
Displacement - Loaded  
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range  
Armament  
Anti-Aircraft  
Aircraft 3" L/501: 81
20 mm1: 81
Torpedo Tubes - 1945 01
Armor  
Deck  
Main Belt  
Turrets  
Engines  
Boilers Yarrow: 121,4
Shafts  
Turbines Curtis geared1,4
HP  
Oil  
  CL-8 Detroit
Crew  
Displacement  
Displacement - Loaded  
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range  
Armament  
Anti-Aircraft  
Aircraft  
Torpedo Tubes  
Armor  
Deck  
Main Belt  
Turrets  
Engines  
Boilers Yarrow: 121,4
Shafts  
Turbines Curtis geared1,4
HP  
Oil  
  CL-9 Richmond
Crew  
Displacement  
Displacement - Loaded  
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range  
Armament  
Anti-Aircraft  
Aircraft  
Torpedo Tubes  
Armor  
Deck  
Main Belt  
Turrets  
Engines  
Boilers White-Foster: 121,4
Shafts  
Turbines Parsons geared1,4
HP  
Oil  
  CL-10 Concord
Crew  
Displacement  
Displacement - Loaded  
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range  
Armament 6" twin mounts2: 22
6"2, 6" L/53 Mk XII4: 62, 124
Anti-Aircraft  
Aircraft  
Torpedo Tubes  
Armor  
Deck  
Main Belt  
Turrets  
Engines  
Boilers White-Foster: 121,4
Shafts  
Turbines Parsons geared1,4
HP  
Oil  
  CL-11 Trenton
Crew  
Displacement  
Displacement - Loaded  
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range  
Armament 6" twin mounts2: 22
6"2, 6" L/53 Mk XII4: 62, 124
Anti-Aircraft  
Aircraft  
Torpedo Tubes  
Armor  
Deck  
Main Belt  
Turrets  
Engines  
Boilers White-Foster: 121,4
Shafts  
Turbines Parsons geared1,4
HP  
Oil  
  CL-12 Marblehead
Crew  
Displacement  
Displacement - Loaded  
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range  
Armament 3"2: 62
Anti-Aircraft  
Aircraft  
Torpedo Tubes  
Armor  
Deck  
Main Belt  
Turrets  
Engines  
Boilers White-Foster: 121,4
Shafts  
Turbines Parsons geared1,4
HP  
Oil  
  CL-13 Memphis
Crew  
Displacement  
Displacement - Loaded  
Physical Characteristics  
Length  
Length - Waterline  
Length - Between Perpendiculars  
Beam  
Draft / Height  
Performance  
Speed  
Range  
Armament 6" twin mounts2: 22
6"2, 6" L/53 Mk XII4: 62, 124
3"1,2: 71,2
Anti-Aircraft 40 mm twin mounts1: 21
Aircraft  
Torpedo Tubes  
Armor  
Deck  
Main Belt  
Turrets  
Engines  
Boilers White-Foster: 121,4
Shafts  
Turbines Parsons geared1,4
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
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