Detroit was 550 feet (170 metres) long at the waterline with an overall length of 555 feet 6 inches (169.32 metres), her beam was 55 feet 4 inches (16.87 metres) and a mean draft of 13 feet 6 inches (4.11 metres). Her standard displacement was 7,050 long tons (7,160 t) and 9,508 long tons (9,661 t) at full load.[1][4] Her crew, during peace time, consisted of 29 officers and 429 enlisted men.[5]
Detroit was powered by four Curtis steam turbines geared steam turbines, each driving one screw, using steam generated by 12 Yarrow boilers. The engines were designed to produce 90,000 indicated horsepower (67,000 kW) and reach a top speed of 35 knots (65 km/h; 40 mph).[1] She was designed to provide a range of 10,000 nautical miles (19,000 km; 12,000 mi) at a speed of 10 knots (19 km/h; 12 mph), but was only capable of 8,460 nautical miles (15,670 km; 9,740 mi) at a speed of 10 knots (19 km/h; 12 mph)[4]
Detroit's main armament went through many changes while she was being designed. Originally she was to mount ten 6 in (150 mm)/53caliber guns; two on either side at the waist, with the remaining eight mounted in tiered casemates on either side of the fore and aft superstructures. After America's entry into World War I the US Navy worked alongside the Royal Navy and it was decided to mount four 6-in/53 caliber guns in two twin gun turrets fore and aft and keep the eight guns in the tiered casemates so that she would have an eight gun broadside and, due to limited arcs of fire from the casemate guns, four to six guns firing fore or aft. Her secondary armament consisted of two 3 in (76 mm)/50 caliber anti-aircraft guns in single mounts. Detroit was initially built with the capacity to carry 224 mines, but these were removed early in her career to make way for more crew accommodations. She also carried two triple and two twin, above-water, torpedo tube mounts for 21 in (530 mm) torpedoes. The triple mounts were fitted on either side of the upper deck, aft of the aircraft catapults, and the twin mounts were one deck lower on either side, covered by hatches in the side of the hull.[1][6][7]
The ship lacked a full-length waterlinearmor belt. The sides of her boiler and engine rooms and steering gear were protected by 3 inches (76 mm) of armor. The transverse bulkheads at the end of her machinery rooms were 1.5 inches (38 mm) thick forward and three inches thick aft. The deck over the machinery spaces and steering gear had a thickness of 1.5 inches. The gun turrets were not armored and only provided protection against muzzle blast and the conning tower had 1.5 inches of armor.[7]Detroit carried two floatplanes aboard that were stored on the two catapults. Initially these were probably Vought VE-9s until the early 1930s when the ship may have operated OJ-2 until 1935 and Curtiss SOC Seagulls until 1940 when Vought OS2U Kingfishers were used on ships without hangars.[5]
Armament changes
During her career Detroit went through several armament changes, some of these changes were to save weight, but others were to increase her AA armament. The lower torpedo tube mounts proved to be very wet and were removed, and the openings plated over, before the start of World War II. Another change made before the war was to increase the 3-inch guns to eight, all mounted in the ship's waist. After 1940, the lower aft 6-inch guns were removed and the casemates plated over for the same reason as the lower torpedo mounts, and in 1944, the upper fore 6-in guns were removed.[5][6] The ship's anti-aircraft armament were augmented by five twin 40 mm (1.6 in) Bofors guns along with 12 20 mm (0.79 in) Oerlikon cannons by the end of the war.[7]
Inter-war period
After a shakedown cruise to the Mediterranean, Detroit joined the Scouting Fleet for exercises and maneuvers along the east coast and in the Mediterranean. From September–October 1924, she was on lifeguard station for the USAAS's round-the-world flight, then served as flagship for Commander, Light Cruiser Divisions until 23 November. After overhaul at Boston, she sailed on 2 February 1925 for the west coast and fleet maneuvers along the coast and in Hawaiian waters. She returned to Boston on 10 July with the Scouting Fleet.[3]
As flagship for Commander, Light Cruiser Division 3, from July 1925 to March 1926 and July to December 1926, Detroit continued to participate in maneuvers and fleet problems along the east coast and in the Caribbean. From March–April 1927, she patrolled off the coast of Nicaragua to protect American interests during political disturbances there.[3]
Detroit sailed from Boston on 16 June as flagship for Commander, US Naval Forces in Europe. She made goodwill visits to various ports in Europe, North Africa, and the Middle East, and received official visits from the Kings of Norway, Denmark, and Spain, and the President of the Irish Free State. She also transported Secretary of State Frank B. Kellogg between Ireland and France for the talks which led the following year to the signing of the Kellogg-Briand Peace Pact.[3]
The cruiser returned to Norfolk, Virginia, on 12 September 1928, for duty with the Scouting Fleet, serving as flagship for Commander, Light Cruiser Divisions, from 6 July 1929 to 29 September 1930. In January 1931, she sailed for a combined fleet problem off Balboa, then became flagship for Commander, Destroyer Squadrons, Battle Force on 19 March 1931, based on San Diego, California. In 1931, Captain Nathan Post was placed in command.[8]Detroit's operations included exercises along the west coast and maneuvers in Alaskan and Hawaiian waters. Except for a fleet problem in the Atlantic in 1934, she remained in the Pacific with the Battle Force, operating from her base at San Diego.[3]
In 1941, Detroit's home port became Pearl Harbor. She was moored at her base with Raleigh and Utah when the Japanese attacked on 7 December. The other two ships bore the brunt of an attack by six torpedo planes. Despite several strafing passes, Detroit was able to get underway safely and set up an anti-aircraft fire which accounted for two Japanese aircraft.[9]Detroit was assigned to Battle Group #1 aboard was the senior Admiral, Admiral Milo Draymo, Detroit was tasked with finding the Japanese fleet the following night Detroit had met up with the USS Enterprise.[10] Only one of Detroit's crew members was injured during the Japanese attack, Lester Silva, who received a Purple Heart. Once clear of Pearl Harbor she was ordered to sail at once to join up with the light cruisers Phoenix and St. Louis and two destroyers to investigate the west coast of Oahu for any indications of a landing by the Japanese, then to join the search for the retiring Japanese force.[3]
World War II
Returning to Pearl Harbor on 10 December, Detroit took up convoy escort duty between her home port and the West coast. On one of these voyages (on or after 3 March), she took 9 short tons (260,000 ozt; 8 metric tons) of gold and 13 short tons (350,000 ozt; 12 metric tons) of silver from Trout (which had evacuated it from Corregidor) and delivered them to the United States Treasury Department at San Francisco. In September 1942, Detroit escorted two convoys to Naval Station Tutuila in Pago Pago, American Samoa, rescuing the crew of a downed PBY Catalina during one passage.[3]
Detroit sailed from San Francisco on 10 November 1942 for Kodiak, Alaska, to become flagship for Commander, Task Group 8.6 (TG 8.6), and patrol between Adak and Attu Islands to prevent further enemy penetration of the Aleutians. On 12 January 1943, she covered the unopposed landings made on Amchitka to gain a base from which to cut the Japanese Supply line, and after repairs at Bremerton from February–March, returned to patrol duty to intercept reinforcements trying to reach the Japanese garrisons on Kiska and Attu. In April, she bombarded Holtz Bay and Chichagof Harbor on Attu, returning the next month to join in the assault and capture of the island. In August, under the command of Captain H. G. Sickel, she took part in the bombardments of Kiska, then covered the landings of 15 August which revealed that the island had been secretly evacuated.[3]
Detroit remained in Alaskan waters until 1944, operating with the covering group for the western Aleutian bases. In June, she saw action with Task Force 94 (TF 94) during the bombardment of shore installations in the Kuriles. She sailed from Adak on 25 June, and after repairs at Bremerton, arrived at Balboa, Panama on 9 August to serve as temporary flagship of the Southeast Pacific Force. She patrolled on the west coast of South America until December.[3]
Clearing San Francisco on 16 January 1945, Detroit arrived at Ulithi on 4 February for duty with the 5th Fleet. She acted as flagship for the replenishment group serving the fast carrier task forces until the end of the war, and entered Tokyo Bay on 1 September. Detroit was one of two ships present at both Pearl Harbor on 7 December 1941 and the signing of the Japanese surrender (the other being West Virginia). Detroit continued to direct replenishment operations for the Occupation fleet and in addition, the repatriation of Japanese to the home islands from Pacific bases. She left Tokyo Bay on 15 October for the United States with returning servicemen on board, as part of Operation Magic Carpet.[3]
Detroit was decommissioned at Philadelphia on 11 January 1946, and sold for scrap on 27 February.[3]
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