Casco-class monitor

USS Casco on the James River, 1865
Class overview
NameCasco class
BuildersVarious
OperatorsUnited States Navy
Preceded byPassaic class
Completed20
Retired20
General characteristics
TypeLight draft monitor
Displacement1,175 tons
Length225 ft (69 m)
Beam45 ft (14 m)
Draft6 ft (1.8 m) (designed)
PropulsionSteam engine, twin screws
Speed8 knots (15 km/h; 9.2 mph) (designed)
Armament2 × 11 in (280 mm) guns

The Casco-class monitor was a unique class of light draft monitor built on behalf of the United States Navy for the Mississippi theatre during the American Civil War. The largest and most ambitious ironclad program of the war, the project was dogged by delays caused by bureaucratic meddling. Twenty ships of the class were eventually built at great expense, but proved so unseaworthy when trialed that they were quickly sidelined, causing a public scandal.