SMS Heimdall
SMS  was the fourth vessel of the six-member  of coastal defense ships () built for the German Imperial Navy. Her sister ships were , , , , and . was built by the  (Imperial Shipyard) in Wilhelmshaven between 1891 and 1894, and was armed with a main battery of three  guns. She served in the German fleet throughout the 1890s and was rebuilt in 1900–1902. She served in the VI Battle Squadron after the outbreak of World War I in August 1914, but saw no action. was demobilized in 1915 and used as a barracks ship thereafter. She was ultimately broken up for scrap in 1921. Design

In the late 1880s, the German  (Imperial Navy) grappled with the problem of what type of capital ship to build in the face of limited naval budgets (owing to parliamentary objections to naval spending and the cost of dredging the Kaiser Wilhelm Canal). General Leo von Caprivi, the new  (Chief of the Admiralty), requested a series of design proposals, which ranged in size from small  coastal defense ships to heavily armed  ocean-going battleships. Caprivi ordered ten coastal defense ships to guard the entrances to the canal, since even opponents of the navy in the  (Imperial Diet) agreed that such vessels were necessary. The first six of these, the , were based on the smallest proposal. was  long overall and had a beam of  and a maximum draft of . She displaced  normally and up to  at full load. Her hull had a long forecastle deck that extended most of the vessel's length. She was also fitted with a pronounced ram bow. had a crew of 20 officers and 256 enlisted men. Her propulsion system consisted of two vertical 3-cylinder triple-expansion engines, each driving a screw propeller. Steam for the engines was provided by four coal-fired fire-tube boilers that were vented through a single funnel. The ship's propulsion system provided a top speed of  from   and a range of approximately  at . The ship was armed with a main battery of three  K L/35 guns mounted in three single gun turrets. Two were placed side by side forward, and the third was located aft of the main superstructure. They were supplied with a total of 204 rounds of ammunition. For defense against torpedo boats, the ship was also equipped with a secondary battery of eight  SK L/30 guns in single mounts. also carried four  torpedo tubes, all in swivel mounts on the deck. One was at the bow, another at the stern, and two amidships. The ship was protected by an armored belt that was  in the central citadel, and an armored deck that was  thick. The conning tower had  thick sides. s armor consisted of new Krupp steel, a more effective type of armor than the compound steel the other members of the class received. Modifications
In 1897, the ship had her anti-torpedo nets removed. was extensively rebuilt between 1901 and 1902 in an attempt to improve her usefulness. The ship was lengthened to , which increased displacement to  at full load. The lengthened hull space was used to install additional boilers; her old fire-tube boilers were replaced with more efficient water-tube boilers, and a second funnel was added. The performance of her propulsion machinery increased to  from , with a maximum range of  at 10 knots. Her secondary battery was increased to ten 8.8 cm guns, and the 35 cm torpedo tubes were replaced with three  tubes. Her crew increased to 20 officers and 287 enlisted men. Work was completed by 1900. Service history

 was laid down on 2 November 1891 at the  (Imperial Shipyard) in Wilhelmshaven. She was launched on 27 July 1892, and Kaiser Wilhelm II christened the ship at her launching. She was commissioned on 7 April 1894 to begin sea trials. Initial testing revealed serious defects with her boilers, forcing her to return to the shipyard for an extensive overhaul. completed trials on 15 December, after which she was assigned to the Reserve Division of the Baltic Sea. She was transferred to Kiel and had her crew reduced while not in active service. The ship had her crew replenished in early 1895 to take part in training exercises with the Armored Ship Division in the western and central Baltic from April to June. During this period, she was commanded by  (Lieutenant at Sea) Carl Schaumann, but in May, he was replaced by  (KK—Corvette Captain) Adolf Goetz. She was present for the opening ceremonies of the Kaiser Wilhelm Canal on 20 June. Crew shortages necessitated s decommissioning on 5 July so that her crew would be available for vessels that were being sent to East Asia and Morocco. The ship remained out of service until 8 August 1897, when she was recommissioned to take part in annual fleet maneuvers as part of II Battle Squadron, under the command of KK Oskar von Truppel. While steaming in Danish waters on 8 September,  suffered a serious accident and had to return to Kiel for repairs at the  there. The ship was reactivated on 26 July 1898, KK Hermann Lilie serving as her captain, for the annual fleet exercises that concluded on 29 September, and was thereafter decommissioned again. was next recommissioned for the fleet maneuvers of 1900, which lasted from 24 July to 29 September. The ship was commanded by KK Malte von Schimmelmann at that time. She was thereafter taken into hand at the  in Kiel for a major modernization that lasted into 1902. As in previous years, the ship was reactivated to take part in summer training exercises from July to September in 1902 and 1903. KK Hartwig von Dassel and KK Paul Schlieper served as the ship's commander during the 1902 and 1903 reactivations, respectively. She was thereafter allocated to the reserve fleet, being reactivated just once more for maneuvers in the following ten years, in 1909. The ship's captain at that time was  (Frigate Captain) Carl Hollweg. World War I

Following the outbreak of World War I in July 1914,  was mobilized into VI Battle Squadron for coastal defense, along with her sister ships and the two s. Activated in August under the command of  (KzS–Captain at Sea) Rudolf Bartels, the ship's crew was assembled by 14 September in Wilhelmshaven. She was initially used to guard the Jade Bight from 19 September to 6 October. The next day, she was moved to the mouth of the Weser, which she patrolled until 7 November, apart from a brief recall to the Jade in early November. The ships of VI Squadron were stationed in the outer Jade roadstead to cover the battlecruisers of I Scouting Group during the Raid on Yarmouth on 2–3 November. She thereafter returned briefly to the Weser before steaming to Wilhelmshaven. She remained on guard duty in the Jade from 18 November to 11 June 1915. During this period, on 23 December 1914,  accidentally rammed the dreadnought battleship  in the Wilhelmshaven roadstead, but neither vessel was seriously damaged in the incident. Bartels became the senior-most officer of the guard ships stationed in the Ems on 15 June 1915. On 31 August 1915, VI Battle Squadron was disbanded, but  remained on guard duty; she was assigned to the newly formed Coastal Defense Flotilla based in the Ems. AT that time, KzS Ernst Ewers took command of the ship, and at the same time gained command of the new flotilla. In addition to her normal activities, she was also used as a target ship for shooting practice during this period. On 24 February 1916,  was withdrawn from active service, and she was decommissioned for the last time on 2 March in Emden. She was thereafter used as a barracks ship and tender for the U-boats of IV U-boat Flotilla and the guard ships that remained on station in the Ems. On 17 June 1919, she was stricken from the naval register. The navy planned to convert  into a salvage ship, but the plan fell through and she was instead sold and broken up for scrap in 1921 in Rönnebeck. Notes

References

Further reading
 

Ships built in Wilhelmshaven
1892 ships
World War I coastal defense ships of Germany
Siegfried-class coastal defense ships