Eidsvold-class coastal defence ship

The Eidsvold class was a class of coastal defence ships, two of which were built for the Royal Norwegian Navy in 1899 by Armstrong Whitworth. The class consisted of two ships, HNOMS Eidsvold and HNOMS Norge. Locally they were referred to as panserskip (lit.: armoured ship).

Description
Built as part of the general rearmament in the time leading up to the events in 1905, the two ships of the Eidsvold class remained, along with the slightly older Tordenskjold-class coastal defence ship, the backbone of the Norwegian Navy until the German invasion of Norway in 1940. Norge and Eidsvold were the largest vessels in the Norwegian Navy, displacing 4,233 tons and crewed by 270 men. It was intended to augment the Norwegian Panserskip fleet with the two ships of the Bjørgvin-class coastal defence ship, ordered in 1912, but both were confiscated by the British Navy at the outbreak of World War I. Obsolete by the time of the German invasion, both Eidsvold-class ships were sunk during the first Battle of Narvik.

The Eidsvold class carried a mixed armament, typical of coastal defense ships:
 * Two 21 cm (8.26 inch) guns mounted in turrets fore and aft as the main armament
 * Six 15 cm (5.90 inch) guns, mounted three on either side in casemates as the secondary armament
 * Eight 7.60 cm (3 inch) guns, four mounted in the battery (two on either side) and the remaining four mounted fore and aft
 * Four 4.7 cm (1.85 inch / 3-pounder) rapid-fire guns for use against torpedo boats
 * Two submerged torpedo tubes

The Eidsvold class was armoured to withstand battle with ships of a similar class, but the underwater armour and internal partitioning were not designed to withstand torpedo hits, which caused both ships' demise:
 * 6 inches (15.24 cm) of Krupp cemented armour in the belt.
 * 9 inches (22.86 cm) of the same armour on the main gun turrets.

HNoMS Eidsvold

 * Builder: Armstrong Whitworth
 * Laid down:
 * Launched: June 14, 1900
 * Commissioned:
 * Operations: Operation Weserübung
 * Victories: None
 * Fate: Sunk by German destroyer Wilhelm Heidkamp at Narvik on 9 April 1940

HNoMS Norge

 * Builder: Armstrong Whitworth
 * Laid down:
 * Launched: March 1900
 * Commissioned:
 * Operations: Operation Weserübung
 * Victories: None
 * Fate: Sunk by German destroyer Bernd von Arnim at Narvik on 9 April 1940