USS O'Brien (DD-415)

O'Brien c. 1940
History
United States
Name	USS O'Brien
Builder	Boston Navy Yard
Laid down	31 May 1938
Launched	20 February 1939
Commissioned	2 March 1940
Honors and awards	American Defense Service Medal ("Fleet" clasp) Asiatic-Pacific Campaign Medal (1 star) World War II Victory Medal
Fate	Torpedoed by I-19 15 September 1942, foundered on 19 October 1942
General characteristics
Class and type	Sims-class destroyer
Displacement	1,570 long tons (1,600 t) (std) 2,211 long tons (2,246 t) (full)
Length	348 ft, 3¼ in, (106.15 m)
Beam	36 ft, 1 in (11 m)
Draft	13 ft, 4.5 in (4.07 m)
Propulsion	High-pressure super-heated boilers, geared turbines with twin screws, 50,000 horsepower
Speed	35 knots
Range	3,660 nautical miles at 20 kt (6,780 km at 37 km/h)
Complement	192 (10 officers/182 enlisted)
Armament	5 × 5 inch/38, in single mounts 4 × .50 caliber/90, in single mounts 8 × 21 inch torpedo tubes in two quadruple mounts 2 × depth charge track, 10 depth charges

USS O'Brien (DD-415) was a World War II-era Sims-class destroyer in the service of the United States Navy, named in honor of Captain Jeremiah O'Brien and his five brothers, Gideon, John, William, Dennis and Joseph, who captured HMS Margaretta on 12 June 1775 during the American Revolution.

O’Brien was laid down at Boston Navy Yard, Boston, Massachusetts, on 31 May 1938; launched on 20 October 1939; sponsored by Miss Josephine O’Brien Campbell, a great-great-great granddaughter of Gideon O’Brien; and commissioned on 2 March 1940. Since this warship was built in a drydock, along with the destroyers Walke, Lansdale, and Madison, the christening and commissioning ceremonies were combined.