Admiral Ushakov-class coastal defense ship

Admiral Seniavin underway in 1901
Class overview
Name:	Admiral Ushakov class
Builders:	New Admiralty Shipyards and Baltic Works, Saint Petersburg, Russia
Operators:	Imperial Russian Navy  Imperial Japanese Navy
Succeeded by:	Gangut
Built:	1892–1899
In commission:	1895–1935
Planned:	3
Completed:	3
Lost:	1
Scrapped:	2
General characteristics
Type:	Coastal defense ship
Displacement:	4,971 long tons (5,051 t)
Length:	87.3 m (286 ft 5 in)
Beam:	15.85 m (52 ft 0 in)
Draught:	5.9 m (19 ft 4 in)
Propulsion:	2 shaft vertical triple expansion steam engines 4-8 cylindrical coal-fired boilers 4,290 kW (5,750 ihp) 450 tons coal
Speed:	16 knots (30 km/h; 18 mph)
Complement:	404
Armament:	3 or 4 - 254 mm (10 in) guns 4 × 1 - 120 mm (4.7 in) guns 6 × 1 - 47 mm (2 in) 3-pounder guns 10 × 1 - 37 mm (1.5 in) 1-pounder guns 4 × 381 mm (15 in) above water torpedo tubes
Armour:	Harvey armour Belt: 102–254 mm (4–10 in) Decks: 51–76 mm (2–3 in) Turrets: 203 mm (8 in) Conning tower: 203 mm (8 in)

The Admiral Ushakov class were coastal defense battleships built for the Imperial Russian Navy during the 1890s to counter armored ships of the Swedish Navy. All three ships were stationed in the Baltic Sea when the Russo-Japanese war began and sailed with the Baltic Fleet around the Cape of Good Hope to the Pacific. Two ships were captured by the Japanese and one was scuttled during the Battle of Tsushima.

They had an overall length of 87.33 metres (286 ft 6 in), a beam of 16 m (52 ft), and a draft of 5.9 m (19 ft 6 in) at deep load. They displaced 4,971 long tons (5,051 t).

The Admiral Ushakovs used vertical triple expansion steam engines that produced 4,290 kW (5,750 ihp). They were fed by 8 cylindrical coal-fired boilers, except in Admiral Ushakov which only had four boilers. The engines drove 2 shafts for a maximum speed of 16 knots (30 km/h; 18 mph). They carried 300 long tons (300 t) of coal at normal load and 450 long tons (460 t) at deep load.

The Admiral Ushakovs had four 45-caliber 250-millimetre (10 in) guns in two twin-gun turrets, mounted fore and after of the superstructure, except for General Admiral Graf Apraksin, whose rear turret only had a single gun. Their secondary armament consisted of four 120 mm (4.7 in) guns mounted in casemates at the corners of the superstructure.

Their armour consisted of a 254-millimetre (10 in) waterline belt 52 metres (170 ft) long that protected the ship's vitals. It tapered down to 102 millimetres (4 in) at the ends where it met bulkheads 152–203 millimetres (6–8 in) thick that protected the ends of the ship. The deck was 51–76 mm (2–3 in) thick. The turrets and the conning tower had 203 millimetres (8 in) of armour. Harvey armour was used throughout.