 Fingal was designed and built as a <unk> by J & G Thomson 's Clyde Bank Iron Shipyard at <unk> in Glasgow , Scotland , and was completed early in 1861 . She was described by <unk> <unk> Scales , who served on the Atlanta before her battle with the monitors , as being a two @-@ <unk> , iron @-@ <unk> ship 189 feet ( 57 @.@ 6 m ) long with a beam of 25 feet ( 7 @.@ 6 m ) . She had a draft of 12 feet ( 3 @.@ 7 m ) and a depth of hold of 15 feet ( 4 @.@ 6 m ) . He estimated her tonnage at around 700 tons <unk> . Fingal was equipped with two vertical single @-@ cylinder direct @-@ acting steam engines using steam generated by one <unk> @-@ tubular boiler . The engines drove the ship at a top speed of around 13 knots ( 24 km / h ; 15 mph ) . They had a bore of 39 inches ( 991 mm ) and a stroke of 30 inches ( 762 mm ) . 
