Erie-class gunboat

The Erie-class gunboats were a class of gunboats built by the United States prior to World War II. The class was designed in 1932, and commissioned into the United States Navy in 1936: Erie (PG-50) and Charleston (PG-51). The Eries had a design speed of 20 knots (37 km/h; 23 mph) and a main armament of four 6-inch (152 mm) guns in single mounts with four 1.1-inch (28 mm) quadruple mount anti-aircraft guns.

Class overview
USS Erie (PG-50)
Builders	New York Navy Yard (PG-50) Charleston Navy Yard (PG-51)
Operators	United States Navy Massachusetts Maritime Academy 1948-1957 (PG-51)
Preceded by	Asheville class
Succeeded by	PGM-1 class
Built	1934–1936
In commission	1936–1945
Planned	2
Completed	2
Lost	1
Retired	1
General characteristics
Type	Gunboat
Displacement	2,000 long tons (2,032 t) (standard) 2,830 long tons (2,875 t) (full load)
Length	328 ft 6 in (100.13 m) o.a. 308 ft (94 m) p.p.
Beam	41 ft 3 in (12.57 m)
Draft	14 ft 10 in (4.52 m) (full load)
Installed power	2 × Babcock & Wilcox boilers 6,200 shp (4,600 kW)
Propulsion	2 × Parsons geared single reduction steam turbines 2 × shafts
Speed	20 kn (37 km/h; 23 mph)
Range	8,000 nmi (9,200 mi; 15,000 km) at 12 kn (22 km/h; 14 mph)
Complement	243
Sensors and processing systems	Mark 3 Radar (mounted atop battery director) ASDIC Sonar
Armament	4 × 6 in (152 mm)/47 caliber Mark 17 guns 4 × Quadruple 1.1 in (28 mm)/75 cal anti-aircraft guns (4x4) 6 × 20 mm (0.79 in) anti-aircraft guns (refit) 2 × Mark 6 Depth charge racks (each holding 15 depth charges)
Armor	Side belt (over vital places):3.5 in (89 mm) Deck: 1.25 in (32 mm) Conning Tower: 4 in (100 mm) Gunshields: 1 in (25 mm)
Aircraft carried	1 × floatplane "Seagull" (original equipment, replaced in refit) 1 × floatplane "Kingfisher"
Aviation facilities	Derrick

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