Cerberus-class monitor

	Stern view of Cerberus at Williamstown, Victoria in 1871
Class overview
Builders	Thames Ironworks and Shipbuilding Company; Palmers Shipbuilding and Iron Company;
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 and Shipbuilding Company Palmers Shipbuilding and Iron Company
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)