USS Ampere (ADG-11), heads out to sea c. 1955/1956.
History
United States
Name	PCE-919 Drake (1943–1945) YDG-11 (1945–1955)
Namesake	A male Duck
Builder	Willamette Iron and Steel Works, Portland, Oregon
Laid down	24 November 1943
Launched	12 August 1944
In service	15 August 1945
Out of service	1 November 1947
Renamed	Drake, 24 November 1943 YDG-11, 20 April 1945 ADG-11, 1 November 1947
Reclassified	Minesweeper, 24 November 1943 District Degaussing Vessel, 20 April 1945 Degaussing Ship, 1 November 1947
Identification	Hull symbol: PCE-919 Hull symbol: AM-359 Hull symbol: YDG-11 Hull symbol: ADG-11 Code letters: NHYV (Drake) Code letters: NJZK
Fate	laid up in the Pacific Reserve Fleet, San Diego Group, November 1947
United States
Name	ADG-11
In service	July 1951
Out of service	February 1957
Renamed	Ampere, 1 February 1955
Stricken	1 July 1961
Homeport	Yokosuka, Japan (1951–1954) Sasebo, Japan (1954–1957)
Identification	Hull symbol: ADG-11
Fate	Sold, 21 June 1962
Philippines
Owner	Philippine President Lines, Manila
Acquired	21 June 1962
Status	unknown
General characteristics [1]
Class and type	Admirable-class minesweeper
Displacement	625 long tons (635 t)
Length	184 ft 6 in (56.24 m)
Beam	33 ft (10 m)
Draft	9 ft 9 in (2.97 m)
Installed power	2 × Busch-Sulzer 539 diesel engines 1,710 shp (1,280 kW)
Propulsion	Farrel-Birmingham single reduction gear 2 × propellers
Speed	14 kn (26 km/h; 16 mph)
Complement	68
Armament	1 × 3 in (76 mm)/50 caliber dual-purpose (DP) gun
Service record
Part of:	Pacific Reserve Fleet (1946-51, 1957-61) US Pacific Fleet (1951-57)

USS Ampere (PCE-919/AM-359/YDG-11/ADG-11) was originally planned as a PCE-905-class patrol craft for the United States Navy, PCE-919, and laid down as an Admirable-class minesweeper, named Drake, for the male duck. Before she was commissioned, her name was cancelled and she was reclassified as a District Degaussing Vessel. She was later renamed Ampere, after the ampere, a unit of electric current, which takes its name from the French physicist André-Marie Ampère.

Design

Ampere was 184 ft 6 in (56.24 m) long, 33 ft (10 m) wide, had a draft of 9 ft 9 in (2.97 m), and displaced 625 long tons (635 t). She had an average speed of 14 kn (26 km/h; 16 mph). She had a complement of 68 men, and was armed only with a 3 in (76 mm)/50 caliber dual-purpose (DP) gun. She was propelled by two Busch-Sulzer 539 diesel engines, which produced a total 1,710 shp (1,280 kW), and had a Farrel-Birmingham single reduction gear alongside two propellers.^[1]

Construction

Drake was laid down on 24 November 1943, at Portland, Oregon by the Willamette Iron and Steel Works, and launched on 12 August 1944. On 20 April 1945, her name was canceled, and she was re-designated as a degaussing vessel, YDG-11. The ship was placed in service on 15 August 1945, the day after the Japanese surrender.^[2]

Service history

Due to the cessation of hostilities, YDG-11 saw little or no active service before being berthed with the Pacific Reserve Fleet at San Diego, California. She was retained on an inactive, in service, status until the winter of 1946 and 1947, when she was placed out of service, in reserve. On 1 November 1947 she was re-designated ADG-11. The ship remained inactive until July 1951, when she was again placed in service. Assigned to the Far East, ADG-11 was based at Yokosuka, Japan until sometime in 1954. After that, her home port was Sasebo, Japan. On 1 February 1955, she was renamed Ampere. The ship was placed out of service in February 1957. Her equipment was transferred to USS Surfbird, a minesweeping vessel which was redesignated a degaussing ship on 15 June 1957. She remained in reserve in the Far East until the summer of 1961, when the decision was made to dispose of her. Her name was struck from the Naval Register on 1 July 1961, and she was sold on 21 June 1962, to the Philippine President Lines of Manila.^[2] Her final disposition is unknown.^[1]