Admiral Spiridov-class monitor

Admiral Chichagov at anchor
Class overview
Name	Admiral Spiridov
Builders	Semiannikov & Poletika Shipyard, Saint Petersburg
Operators	Imperial Russian Navy
Preceded by	Admiral Lazarev class
Succeeded by	Russian ironclad Petr Veliky
Cost	1,177,500 Rubles[1]
Built	1866–1869
Completed	2
Scrapped	2
General characteristics (as built)
Type	Monitor
Displacement	3,505–3,587 long tons (3,561–3,645 t)
Length	254 ft (77.4 m) (waterline)
Beam	43 ft (13.1 m)
Draft	21 ft (6.4 m)
Installed power	2,000 ihp (1,500 kW) 4 rectangular fire-tube boilers
Propulsion	1 Shaft 1 Horizontal direct-action steam engine
Speed	10 knots (19 km/h; 12 mph)
Range	1,400 nmi (2,600 km; 1,600 mi) at 10 knots (19 km/h; 12 mph)
Complement	280 officers and crewmen
Armament	2 × twin 9-inch (229 mm) Rifled muzzle-loading guns 12–15 mines
Armor	Belt: 3–7.5 in (76–191 mm) Gun turrets: 6–6.5 in (152–165 mm) Conning tower: 5 in (127 mm) Deck: 1 in (25 mm)

The Admiral Spiridov class were a pair of monitors built for the Imperial Russian Navy in the late 1860s. The sister ships were assigned to the Baltic Fleet upon completion and remained there for their entire careers. Aside from several accidental collisions and one grounding, their careers were uneventful. They were reclassified as coast-defense ironclads in 1892 before they became training ships in 1900. The Admiral Spiridovs were stricken from the Navy List in 1907; one ship became a stationary target and the other a coal-storage barge. Their ultimate fates are unknown.