Cerberus-class monitor

	Stern view of Cerberus at Williamstown, Victoria in 1871
Class overview
Builders	Thames Ironworks; Palmers Shipbuilding & Iron Co.;
Operators	Royal Navy; Royal Australian Navy;
Built	1867–1870
In commission	1870–1924
Completed	2
General characteristics
Displacement	3,344 long tons (3,398 t)
Length	225 ft (69 m)
Beam	45 ft (14 m)
Draught	15 ft 4 in (4.67 m)
Propulsion	2 shaft Maudslay, 1,360 ihp (Cerberus); 2 shaft Ravenhill 1,436 ihp, (Magdala);
Speed	9.75 knots (11 mph; 18 km/h) (Cerberus); 10.6 knots (12 mph; 20 km/h) (Magdala);
Complement	155
Armament	4 × 10-inch (254 mm) (2 × 2) Rifled Muzzle Loading guns
Armour	Belt: 6–8 in (150–200 mm) with 9–11 in (230–280 mm) wood backing; Turret: 9–10 in (230–250 mm); Breastworks: 8–9 in (200–230 mm); Deck: 1–1.5 in (25–38 mm);

The Cerberus-class breastwork monitor was a pair of breastwork monitors built for the Royal Navy in the 1860s.

Class overview
Stern view of Cerberus at Williamstown, Victoria in 1871
Builders	Thames Ironworks Palmers Shipbuilding & Iron Co.
Operators	Royal Navy Royal Australian Navy
Built	1867–1870
In commission	1870–1924
Completed	2
General characteristics
Displacement	3,344 long tons (3,398 t)
Length	225 ft (69 m)
Beam	45 ft (14 m)
Draught	15 ft 4 in (4.67 m)
Propulsion	2 shaft Maudslay, 1,360 ihp (Cerberus) 2 shaft Ravenhill 1,436 ihp, (Magdala)
Speed	9.75 knots (11 mph; 18 km/h) (Cerberus) 10.6 knots (12 mph; 20 km/h) (Magdala)
Complement	155
Armament	4 × 10-inch (254 mm) (2 × 2) Rifled Muzzle Loading guns
Armour	Belt: 6–8 in (150–200 mm) with 9–11 in (230–280 mm) wood backing Turret: 9–10 in (230–250 mm) Breastworks: 8–9 in (200–230 mm) Deck: 1–1.5 in (25–38 mm)