USS Concord in 1943 | |
Class overview | |
---|---|
Name | Omaha class |
Operators | |
Preceded by | Chester class |
Succeeded by | Brooklyn class |
Built | 1918–1925 |
In commission | 1923–1949 |
Planned | 10 |
Completed | 10 |
Scrapped | 10 |
General characteristics | |
Type | Light cruiser |
Displacement | 7,050 long tons (7,163 t) standard, 9,508 long tons (9,661 t) full |
Length | |
Beam | 55 ft 4 in (16.87 m) |
Draft | 20 ft 0 in (6.10 m) |
Installed power |
|
Propulsion |
|
Speed | 35 kn (65 km/h; 40 mph) |
Endurance | 9,000 nmi (17,000 km; 10,000 mi) at 10 kn (19 km/h; 12 mph) |
Boats & landing craft carried | 2 × lifeboats |
Complement | 29 officers 429 enlisted (peace time) |
Sensors and processing systems | SK-1 air-search radar |
Armament |
|
Armor |
|
Aircraft carried | 2 × floatplanes |
Aviation facilities | 2 × aircraft catapults |
The Omaha-class cruisers were a class of light cruisers built for the United States Navy. They were the oldest class of cruiser still in active service with the Navy at the outbreak of World War II, being an immediate post-World War I design.
Maneuvers conducted in January 1915 made it clear that the US Atlantic Fleet lacked the fast cruisers necessary to provide information on the enemy's position, deny the enemy information of the fleet's own position, and screen friendly forces. Built to scout for a fleet of battleships, the Omaha class featured high speed (35 kn (65 km/h; 40 mph)) for cooperation with destroyers, and 6-inch (152 mm) guns to fend off any destroyers the enemy might send against them. Displacing 7,050 long tons (7,160 t ), they were just over 555 ft (169 m) long. [1]
The Omaha class was designed specifically in response to the British Centaur subclass of the C-class cruiser. Although from a modern viewpoint, a conflict between the US and Great Britain seems implausible, US Navy planners during this time, and up to the mid-1930s, considered Britain to be a formidable rival for power in the Atlantic, and the possibility of armed conflict between the two countries plausible enough to merit appropriate planning measures.
The Omaha class mounted four smokestacks, a look remarkably similar to the Clemson-class destroyers (a camouflage scheme was devised to enhance the resemblance). Their armament showed the slow change from casemate-mounted weapons to turret-mounted guns. They carried twelve 6 in (150 mm)/53 caliber guns, of which four were mounted in two twin turrets, one fore and one aft, and the remaining eight in casemates; four on each side, at the corners of the superstructure. This gave them a broadside of eight guns. Launched in 1920, Omaha (designated C-4 and later CL-4) had a displacement of 7,050 long tons. The cruisers emerged with a distinctly old-fashioned appearance owing to their World War I-type stacked twin casemate-mount cannons and were among the last broadside cruisers designed anywhere. [2]
Additional torpedo tubes and hydrophone installation was ordered. As a result of the design changes placed on the ship mid-construction, the vessel that entered the water in 1920, was a badly overloaded design that, even at the beginning, had been rather tight. The ships were insufficiently insulated, too hot in the tropics and too cold in the north. Sacrifices in weight savings in the name of increased speed led to severe compromise in the habitability of the ship. While described as a good ship in a seaway, the low freeboard led to frequent water ingestion over the bow and in the torpedo compartments and lower aft casemates. The lightly built hulls leaked, so that sustained high-speed steaming contaminated the oil tanks with sea water. [3]
A serious flaw in these ships' subdivision was the complete lack of watertight bulkheads anywhere above the main deck or aft on the main deck. [4]
These drawbacks notwithstanding, the US Navy took some pride in the Omaha class. They featured improved compartmentalization; propulsion machinery was laid out on the unit system, with alternating groups of boiler rooms and engine rooms, to prevent immobilization by a single torpedo hit. Magazines were the first to be placed on centerline, below the waterline. These were also the first U.S. Navy cruisers designed after the switch from coal to oil-fired boilers.
Originally designed to serve as scouts, they served throughout the interwar period as leaders of fleet flotillas, helping them resist enemy destroyer attack. Tactical scouting became the province of cruiser aircraft, and the distant scouting role was taken over by the new heavy cruisers spawned by the Washington Naval Treaty. Thus, the Omaha class never performed their designed function. They were relegated to the fleet-screening role, where their high speed and great volume of fire were most appreciated. [5]
During their careers the Omahas went through several armament changes. Some of these changes were to save weight, while others were to increase their AA armament. On 8 September 1926, the Chief of Naval Operations, Admiral Edward W. Eberle, along with the Commanders in Chief of the United States Fleet and Battle Fleet, and their subordinate commanding officers, the Secretary of the Navy, Curtis D. Wilbur, ordered that all mines and the tracks for laying the mines be removed from all of the Omaha-class cruisers, as the working conditions had been found to be very "wet". In 1933–1934, their 3-inch AA guns were increased from two to eight, all mounted in the ship's waist. [6] The lower torpedo tube mounts, which had also proved to be very wet, were removed and the openings plated over before the start of World War II. After 1939, the lower aft 6-inch guns were removed from most of the Omahas and the casemates plated over for the same reason as the lower torpedo mounts. The ships' AA armament was first augmented by three quadruple 1.1-inch (28 mm)/75 gun mounts by early 1942, however, these did not prove reliable and were replaced by twin 40-millimeter (1.57 in) Bofors guns later in the war. At about the same time they also received 20-millimeter (0.79 in) Oerlikon cannons. [7]
Both Detroit and Raleigh were at Pearl Harbor during the Japanese surprise attack, with Raleigh being torpedoed. Detroit, along with St. Louis and Phoenix, were the only large ships to get out of the harbor during the attack.
The ships of the Omaha class spent most of the war deployed to secondary theaters and in less vital tasks than those assigned to more recently built cruisers. The Omaha class were sent to places where their significant armament might be useful if called upon, but where their age and limited abilities were less likely to be tested. These secondary destinations included patrols off the east and west coasts of South America, convoy escort in the South Pacific far from the front lines of battle, patrols and shore bombardment along the distant and frigid Aleutians and Kuril Islands chains, and bombardment duty in the invasion of Southern France when naval resistance was expected to be minimal. The most significant action that any of the ships of the class saw during the war was Marblehead 's participation in early war actions around the Dutch East Indies (most notably, the Battle of Makassar Strait), and Richmond 's engagement in the Battle of the Komandorski Islands.
None of the ships were wartime losses. Raleigh's torpedo damage at Pearl Harbor and Marblehead's damage at Makassar Strait were the only significant wartime combat damage suffered by the class.
The ships of the class were considered obsolete as the war ended, and were decommissioned and scrapped within seven months of the surrender of Japan (with the exception of Milwaukee, which had been loaned to the Soviet Navy, and was scrapped when returned to US Navy control in 1949).
The following ships of the class were constructed. [8]
Ship name | Hull no. | Builder | Laid down | Launched | Comm. | Decomm. | Fate |
---|---|---|---|---|---|---|---|
Omaha | CL-4 | Todd Dry Dock and Construction Company, Tacoma, Washington | 6 Dec 1918 | 14 Dec 1920 | 24 Feb 1923 | 1 Nov 1945 | Struck 28 Nov 1945; Scrapped Feb 1946 |
Milwaukee | CL-5 | 13 Dec 1918 | 24 Mar 1922 | 20 Jun 1923 | 16 Mar 1949 | Struck 18 Mar 1949; Sold for scrap, 10 Dec 1949 | |
Cincinnati | CL-6 | 15 May 1920 | 23 May 1921 | 1 Jan 1924 | 1 Nov 1945 | Scrapped Feb 1946 | |
Raleigh | CL-7 | Bethlehem Shipbuilding Corporation, Fore River Shipyard, Quincy, Massachusetts | 16 Aug 1920 | 25 Oct 1922 | 6 Feb 1924 | 2 Nov 1945 | Struck 28 Nov 1945; Scrapped, Feb 1946 |
Detroit | CL-8 | 10 Nov 1920 | 29 Jun 1922 | 31 Jul 1923 | 11 Jan 1946 | Struck 21 Jan 1946; Scrapped, Feb 1946 | |
Richmond | CL-9 | William Cramp & Sons, Philadelphia | 16 Feb 1920 | 29 Sep 1921 | 2 Jul 1923 | 21 Dec 1945 | Struck 21 Jan 1946; Sold for scrap, 18 Dec 1946 |
Concord | CL-10 | 29 Mar 1920 | 15 Dec 1921 | 3 Nov 1923 | 12 Dec 1945 | Struck 8 Jan 1946; Sold for scrap, 21 Jan 1947 | |
Trenton | CL-11 | 18 Aug 1920 | 16 Apr 1923 | 19 Apr 1924 | 20 Dec 1945 | Struck 21 Jan 1946; Sold for scrap, 29 Dec 1946 | |
Marblehead | CL-12 | 4 Aug 1920 | 9 Oct 1923 | 8 Sep 1924 | 1 Nov 1945 | Struck 28 Nov 1945; Sold for scrap 27 Feb 1946 | |
Memphis | CL-13 | 14 Oct 1920 | 17 Apr 1924 | 4 Feb 1925 | 17 Dec 1945 | Struck 8 Jan 1946; Sold for scrap, 18 Dec 1947 |
Two other Omaha versions were also designed. The first, intended to function as a monitor, had two 14-inch guns in 2 single turrets, while the other design had four 8-inch guns in two twin turrets. The second design eventually evolved into the Pensacola-class cruiser. [ citation needed ]
A light cruiser is a type of small or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck. Prior to this smaller cruisers had been of the protected cruiser model, possessing armored decks only. While lighter and smaller than other contemporary ships they were still true cruisers, retaining the extended radius of action and self-sufficiency to act independently around the world. Cruisers mounting larger guns and heavier armor relative to most light cruisers would come to be known as heavy cruisers, though the designation of 'light' versus 'heavy' cruisers would vary somewhat between navies. Through their history light cruisers served in a variety of roles, primarily as convoy escorts and destroyer command ships, but also as scouts and fleet support vessels for battle fleets.
A heavy cruiser was a type of cruiser, a naval warship designed for long range and high speed, armed generally with naval guns of roughly 203 mm (8 inches) in calibre, whose design parameters were dictated by the Washington Naval Treaty of 1922 and the London Naval Treaty of 1930. Heavy cruisers were generally larger, more heavily-armed and more heavily-armoured than light cruisers while being smaller, faster, and more lightly-armed and armoured than battlecruisers and battleships. Heavy cruisers were assigned a variety of roles ranging from commerce raiding to serving as 'cruiser-killers,' i.e. hunting and destroying similarly-sized ships.
The Atlanta-class cruisers were eight United States Navy light cruisers which were designed as fast scout cruisers, flotilla leaders, or destroyer leaders, but which proved to be effective anti-aircraft cruisers during World War II. They were also known as the Atlanta-Oakland class. The Atlanta class originally had 16 x 5-inch (127 mm)/38 caliber guns in eight two-gun turrets, arranged with three superfiring turrets forward, three more superfiring aft and two waist mounts, one port and one starboard, giving the first four Atlanta-class cruisers the heaviest anti-aircraft armament of any cruiser of World War II. The last four ships of the class, starting with Oakland, had a slightly revised armament with a reduced main gun battery - the waist turrets being deleted - as they were further optimized for anti-aircraft fire in light of war experience.
The Cleveland-class was a group of light cruisers built for the United States Navy during World War II. They were the most numerous class of light cruisers ever built. Fifty-two were ordered, and 36 were completed, 27 as cruisers and nine as the Independence-class of light aircraft carriers. They were deactivated within a few years after the end of the war, but six were converted into missile ships, and some of these served into the 1970s. One ship of the class remains as a museum ship.
The Wickes-class destroyers were a class of 111 destroyers built by the United States Navy in 1917–19. Together with the six preceding Caldwell-class and following 156 subsequent Clemson-class destroyers, they were grouped as the "flush-deck" or "four-stack" type. Only a few were completed in time to serve in World War I, including USS Wickes, the lead ship of the class.
USS Marblehead (CL-12) was an Omaha-class light cruiser, originally classified as a scout cruiser, of the United States Navy. She was the third Navy ship named for the town of Marblehead, Massachusetts.
USS Memphis (CL-13) was an Omaha-class light cruiser, originally classified as a scout cruiser, of the United States Navy. She was the fourth Navy ship named for the city of Memphis, Tennessee.
USS Omaha (CL-4) was the lead ship of the Omaha-class light cruiser of the United States Navy. She was originally classified as a scout cruiser. She was the second US Navy ship named for the city of Omaha, Nebraska, the first being Omaha, a screw sloop launched in 1869.
USS Milwaukee (CL-5) was an Omaha-class light cruiser built for the United States Navy during the 1920s. The ship spent most of her early career assigned to the Asiatic and Battle Fleets. In 1941, she was assigned to the Neutrality Patrol until she was refitted in New York in late 1941. She escorted a troop convoy to the Pacific in early 1942 before returning to the South Atlantic where she patrolled for German commerce raiders and blockade runners. In November, she intercepted one of the latter, but it scuttled itself before it could be captured. In 1944, she was temporarily transferred to the Soviet Navy and commissioned as Murmansk. The ship was returned by the Soviets in 1949 and sold for scrap in December.
USS Cincinnati (CL-6), was the third Omaha-class light cruiser, originally classified as a scout cruiser, built for the United States Navy. She was the third Navy ship named after the city of Cincinnati, Ohio, the first being Cincinnati, an ironclad commissioned in 1862, during the Civil War, and the second being Cincinnati, a protected cruiser, that was decommissioned in 1919.
USS Concord (CL-10) was an Omaha-class light cruiser, originally classified as a scout cruiser, of the United States Navy. She was the fourth Navy ship named for the town of Concord, Massachusetts, the site of the first battle of the American Revolution. She spent the first nine years of her career in the Atlantic as part of the Scouting Force. Concord transferred to the Pacific in 1932 and spent the rest of her career, except for the winter of 1938–1939, stationed there. Her home port moved to Pearl Harbor in April 1940, but she escaped the attack on Pearl Harbor because she was in San Diego for an overhaul.
USS Detroit (CL-8) was an Omaha-class light cruiser, originally classified as a scout cruiser, of the United States Navy. She was the fourth Navy ship named for the city of Detroit, Michigan. She spent her first eight years as part of the Scouting Fleet either in the Atlantic or Mediterranean. Her first duty was to assist in the USAAS's first aerial circumnavigation of the world in 1924 and transported the United States Secretary of State Frank B. Kellogg, in 1927, from Ireland to France for the negotiations that led to the signing of the Kellogg-Briand Pact. In 1931 she joined the Battle Force, where her home port was San Diego until moving to Pearl Harbor in 1941. Detroit was moored next to her sister Raleigh when the Japanese attacked on the morning of 7 December 1941.
USS Trenton (CL-11) was an Omaha-class light cruiser, originally classified as a scout cruiser, of the United States Navy. She was the second Navy ship named for the city of Trenton, New Jersey. She spent most of her pre-war career moving between the Atlantic and the Pacific. Trenton joined the Special Service Squadron in 1934, for a good-will tour of Latin America. In May 1939, she would join Squadron 40-T in protecting American interests during the Spanish Civil War and not return to the US until July 1940, when she carried the royal family of Luxembourg, fleeing from the Nazi occupation of their country.
USS Raleigh (CL-7) was the fourth Omaha-class light cruiser, originally classified as a scout cruiser, built for the United States Navy. She was the second Navy ship named for the city of Raleigh, North Carolina, the first being the protected cruiser Raleigh, commissioned in 1894, and decommissioned in 1919.
USS Richmond (CL-9) was an Omaha-class light cruiser, originally classified as a scout cruiser, of the United States Navy. She was the third Navy ship named for the city of Richmond, Virginia.
The Fubuki-class destroyers were a class of twenty-four destroyers of the Imperial Japanese Navy. The Fubuki class has been described as the world's first modern destroyer. The Fubuki class set a new standard not only for Japanese vessels, but for destroyers around the world. They remained formidable opponents to the end of World War II, despite being much older than many of their adversaries.
The Akatsuki-class destroyer was a class of four destroyers of the Imperial Japanese Navy. According to most sources, they are regarded as a sub-class of the Fubuki class, partly because the Imperial Japanese Navy itself kept the improvements made a secret, and did not officially designate these four destroyers as a separate class.
HMS Berwick was one of 10 Monmouth-class armoured cruisers built for the Royal Navy in the first decade of the 20th century. She was assigned to the 2nd Cruiser Squadron of the Channel Fleet upon completion in 1903 and was transferred to the Home Fleet in 1906. She accidentally rammed and sank a British destroyer in 1908. Berwick was refitted in 1908–09 before she was transferred to the 4th Cruiser Squadron on the North America and West Indies Station later that year.
The dreadnought was the predominant type of battleship in the early 20th century. The first of the kind, the Royal Navy's HMS Dreadnought, had such an effect when launched in 1906 that similar battleships built after her were referred to as "dreadnoughts", and earlier battleships became known as pre-dreadnoughts. Her design had two revolutionary features: an "all-big-gun" armament scheme, with an unprecedented number of heavy-calibre guns, and steam turbine propulsion. As dreadnoughts became a crucial symbol of national power, the arrival of these new warships renewed the naval arms race between the United Kingdom and Germany. Dreadnought races sprang up around the world, including in South America, lasting up to the beginning of World War I. Successive designs increased rapidly in size and made use of improvements in armament, armour, and propulsion throughout the dreadnought era. Within five years, new battleships outclassed Dreadnought herself. These more powerful vessels were known as "super-dreadnoughts". Most of the original dreadnoughts were scrapped after the end of World War I under the terms of the Washington Naval Treaty, but many of the newer super-dreadnoughts continued serving throughout World War II.
The flight-deck cruiser was a proposed type of aircraft cruiser,, designed by the United States Navy during the Interwar period. Several designs were proposed for the type, but none was approved for construction. The final design was developed just before World War II, and the entry of the United States into the war saw the project come to an end.