CSS Virginia
Type: Casemate ironclad
Displacement: about 4,000 long tons (4,100 t)
Length: 275 feet (83.8 m)
Beam: 51 feet (15.54 m)
Draft: 21 feet (6.4 m)
Installed power: 1,200 indicated horsepower (890 kW)
Speed: 5–6 kn (9.3–11 km/h; 5.8–6.9 mph)
Complement: about 320 officers and men
Armament: 2 × 7-inch (178 mm) Brooke rifles
2 × 6.4-inch (160 mm) Brooke rifles
6 × 9-inch (229 mm)
Dahlgren smoothbores
2 × 12-pounder (5 kg) howitzers
Armor: Belt: 1–3 in (25–76 mm)
Deck: 1 in (25 mm)
Casemate: 4 in (102 mm)
uss monitor
Type: Monitor
Displacement: 987 long tons (1,003 t)
Length: 172 ft (52 m)
Beam: 41 ft 6 in (12.65 m)
Draft: 10 ft 6 in (3.20 m)
Installed power: Vibrating-lever steam engine
Propulsion: Screw propeller
Speed: 8 kn (9.2 mph; 15 km/h)
Complement: 59 officers and men
Armament: 2 × 11 in (280 mm) Dahlgren guns
Armor: Iron plates