british battleship Royal Oak

15inch guns swung to starboard to avoid heavy seas entering the muzzles. North Sea November 1937

HMS Royal Oak (pennant number 08) was a British Royal Navy Revenge-class battleship , torpedoed at anchor by the German submarine U-47 on 14 October 1939.
Displacement: 33,500 tons full load
Length: 189 m
Beam: 31.1 m
Draught: 8.7 m
Propulsion: 4 shaft Parsons geared turbines
18 Yarrow boilers
40,000 shp
Speed: 20 knots (37 km/h)
Range: 4,000 nautical miles (7,400 km)
Complement: 1,009 to 1,146
Armament: 4 × twin Mk I 15inch guns
12 × single Mk XII 6-inch (150 mm) guns
4 × 2 4-inch (102 mm) guns
2 × 8 2-pdr (900 g) anti-aircraft guns
4 × 21 inch (533 mm) torpedo tubes