Design
''Gefion'' was designed to serve as a colonial cruiser in the German colonial empire; during peacetime she was to police German holdings and suppress native unrest, and in times of war she would act as a commerce raider. In addition, the new cruiser design was intended to be capable of serving as a fleet scout.Hildebrand, Röhr, & Steinmetz, p. 194 This pair of roles was necessary because the German naval budget was too small to permit development of pure fleet scouts and colonial cruisers. Indeed, ''Gefion'' was essentially a smaller version of contemporary German protected cruisers such as . As a result of the competing design requirements—a high top speed necessary for a fleet scout, very long cruising radius for a commerce raider, and the firepower necessary in the colonies—the resulting design was unsatisfactory. ''Gefion'', classified as a cruiser-corvette, was authorized in the 1890–91 budget and named for the earlier sail frigate . The contract for her construction was awarded to Schichau-Werke in late 1891. She was the last unprotected cruiser built by the ''Kaiserliche Marine'' (Imperial Navy); thereafter, the Germans built the of light cruisers to fill the need for small, overseas cruisers.General characteristics and machinery
''Gefion'' was length at the waterline, long at the waterline and length overall, long overall. She had a beam (nautical), beam of and had a draft (hull), draft of forward and aft. She was designed to displace , but with a full ammunition, stores, and fuel load she displaced up to . The hull was constructed from transverse and longitudinal steel frames, except for the lower Stem (ship), stem and stern parts, which were made of bronze. The frames were covered with wood planking and a metal sheath that extended to above the waterline to reduce fouling.Gröner, p. 98 She was fitted with a fore and main pole mast with spotting tops to aid her gunnery. The ship had a crew of 13 officers and 289 enlisted men. She carried a number of small boats, including one picket boat, one Pinnace (ship's boat), pinnace, two Cutter (boat), cutters, two yawls, and one dinghy. ''Gefion'' was :wikt:crank, crank, rolled badly, and made severe leeway, and her decks were wet in a head sea. She nevertheless maneuvered well and had a tight turning radius. She had a metacentric height of . Steering was controlled by a single rudder. ''Gefion'' was powered by two vertical, 3-cylinder triple expansion engines, which drove a pair of 3-bladed screw propellers that were in diameter. Steam was provided by six coal-fired, transverse, cylindrical, double water-tube boilers, which were trunked into three vertical funnels. The engines were designed to produce for a top speed of . On trials, her engines produced and a speed of . The ship could store up to of coal, which enabled her to steam for at a cruising speed of . Electrical power was provided by three generators, which supplied a total output of at 67 volts.Armament and armor
''Gefion'' was originally to be armed with guns, but the main battery was revised to fifteen 10.5 cm SK L/35, SK L/35 guns and finally to ten 10.5 cm guns. These guns were supplied with a total of 807 rounds of ammunition, and they had a maximum range of . She was also equipped with six SK L/40 guns, with 1,500 rounds. They had a range of . The ship was also fitted with two deck-mounted torpedo tubes with a total of five torpedoes. The ship was protected with a light armored deck consisting of steel. The deck was thick, with thick sloped sides. The coaming around the funnels was thick. The engine rooms received much more significant protection, with coaming thick on top of of teak.Service history
The keel for the new cruiser was laid down on 28 March 1892 at the Schichau-Werke shipyard in Danzig, and the completed hull was launched on 31 March 1893. Kaiser Wilhelm II attended her launching, and the speech was given by the director of the Kaiserliche Werft Danzig, ''Kaiserliche Werft'' (Imperial Shipyard) in Danzig, ''Kapitän zur See'' (Captain at Sea) Graf Kurt von Haugwitz. Sea trials began on 27 June 1894 at Kiel and lasted until 2 October. Serious defects in her design, in particular poor ventilation, were revealed through the trials, which necessitated modifications at the Kaiserliche Werft Kiel, ''Kaiserliche Werft'' in Kiel. She was accordingly placed in reserve after completing her trials. The work lasted until mid-1895, and the ship was ready for commissioning on 5 June 1895. That month, she was present for the celebration marking the opening of the Kaiser Wilhelm Canal. In July, she escorted Wilhelm II's yacht SMY Hohenzollern, ''Hohenzollern'' on a visit to the king of Sweden and a trip to the Cowes Regatta. The two ships thereafter visited Leith in the Firth of Forth. Following her return to Wilhelmshaven on 17 August, she participated in the annual autumn fleet maneuvers. During the maneuvers, ''Gefion'', a pair of torpedo boats, and a salvage ship searched for the wrecked torpedo boat in Jammerbugt, Jammer Bay on 28 August. A second attempt was made on 24 September, but it too was unsuccessful. She thereafter resumed her duties as escort for ''Hohenzollern'', and during this period she conducted further sea trials that confirmed her cruising radius, which was the highest of all German ships at the time. In February 1896, she was assigned as the watch ship in Kiel. From 24 to 30 May, she joined maneuvers in the Baltic Sea with the II Division of the I Squadron; these were the four s. ''Gefion'' rejoined ''Hohenzollern'' as her escort for Wilhelm II's voyage to Norway in July. While there, on 10 July, ''Gefion'' helped pull free the stranded French steamer . From 9 August to 15 September, ''Gefion'' participated in the annual autumn fleet maneuvers in the Baltic and North Seas. By 17 September, she was back in Kiel to resume her duties as watch ship. From 2 to 14 December, she accompanied the II Division through the Kattegat and Skagerrak. She returned to Kiel in early 1897 and continued her watch ship duties until June. She took ''Admiral'' Hans von Koester on a trip to Sassnitz in April for celebrations to mark the opening of the first Submarine communications cable, telegraph cable between Germany and Sweden. In June she began to serve as a training ship for Fireman (steam engine), stokers. During this period, she escorted ''Hohenzollern'' to a sailing regatta in the mouth of the Elbe, which was followed by another trip to Norway and Sweden in July.Hildebrand, Röhr, & Steinmetz, p. 195 On 30 July, ''Gefion'' was back in Kiel, though she escorted ''Hohenzollern'' to Kronstadt from 4 to 13 August for Wilhelm II to have a meeting with Czar Nicholas II of Russia, along with the I and II Divisions of the ''Heimatflotte'' (Home Fleet). ''Gefion'' thereafter joined the autumn maneuvers, which lasted until 22 September. She then returned to Kiel for periodic repairs. After this work was completed in December, ''Gefion'' was assigned to the newly formed II Division of the German East Asia Squadron, East Asia Squadron. The Division was commanded by Prince Henry of Prussia (1862–1929), Prince Heinrich, the brother of Wilhelm II, who flew his flag in the re-built armored cruiser . The protected cruiser ''Kaiserin Augusta'' was the third ship in the division. On 15 December, the three ships left Germany, Wilhelm II having instructed their crews, "Should anyone seek to hinder you in the proper exercise of our legitimate rights, go for them with a mailed fist." The division was bound for the newly conquered base at Tsingtau in the Kiautschou Bay concession. They arrived on 5 May 1898 and met the rest of the squadron, which was commanded by ''Vizeadmiral'' (Vice Admiral) Otto von Diederichs.Deployment to the China Station
Shortly before the arrival of the II Division, the United States Navy destroyed the Spanish fleet at the Battle of Manila Bay during the Spanish–American War. Diederichs detached ''Gefion'' to investigate the situation in Manila in an attempt to maneuver Germany into a position to secure colonial possessions in the Philippines, or even to obtain a German prince on the Philippine throne outright. In late March 1899, ''Gefion'' was sent to Kiaotschou in response to mistreatment of German missionaries there; ''Kapitänleutnant'' (Captain Lieutenant) Franz Grapow went ashore with a landing party of 132 marines and artillerymen to punish the offenders. In April, Prince Heinrich replaced Diederichs as the squadron commander. That same month, ''Gefion'' had to leave the harbor at Wusong to assist ''Deutschland'', which had suffered engine damage. At the end of the month, ''Gefion'' steamed up the Yangtze River as far as Hankou. She visited Japanese ports, including Nagasaki, starting in June and the Russian port of Vladivostok in August, before having to assist ''Deutschland'' once again, after the latter vessel struck a reef in Samsah Bay in Fujian. As a precautionary measure, she escorted ''Deutschland'' to Hong Kong for repairs. At the end of the year, ''Gefion'' met ''Deutschland'' in Bangkok; the latter vessel was carrying Prince Heinrich back to Germany. In January 1900, ''Vizeadmiral'' Felix von Bendemann arrived to take command of the East Asia Squadron, aboard his flagship, the protected cruiser . In the first half of the year, ''Gefion'' and the rest of the squadron cruised in the German German New Guinea, central Pacific colonies. By the end of May 1900, the unrest that sparked the Boxer Uprising began to appear in the Shandong Peninsula, particularly around the German base at Tsingtau. After the outbreak of the rebellion, ''Gefion'' and the rest of the squadron joined ships from other European navies to launch a relief expedition under the command of Edward Hobart Seymour. The ships bombarded Chinese coastal defenses southeast of Tianjin and sent an expeditionary force—the Seymour Expedition—ashore at the Battle of Taku Forts (1900), Battle of Taku Forts on 16–17 June. The contingent from ''Gefion'' was commanded by ''Kapitänleutnant'' Otto Weniger; these men participated in the storming of the Great Hsi-Ku Arsenal in Tianjin. Starting in mid-July, ''Gefion'' was stationed outside the mouth of the Yangtze to monitor traffic in the area. In November, she went to Hong Kong for an overhaul. In January 1901, the ship's commander was sent to temporarily govern Tsingtau on behalf of the ill governor. Between February and April, ''Gefion'' was in Nagasaki, and in June she was stationed at Shanghai. She stayed there until September, when the ''Admiralstab'' (Admiralty Staff) ordered her to return to Germany. On 22 September she departed Chinese waters and arrived back in Germany on 1 October.Later service
She was decommissioned for a major reconstruction the day she returned to Germany.Hildebrand, Röhr, & Steinmetz, p. 196 The work was done at the Kaiserliche Werft Wilhelmshaven, ''Kaiserliche Werft'' in Wilhelmshaven from December 1901 to 1904. New, more powerful electrical generators were installed, the upper deck was enclosed, and the 10.5 cm guns that had been located on the upper deck were moved to gun ports in the hull. The two 5 cm guns that were located abreast of the center funnel were moved further aft, to the third funnel. After completion of the work, ''Gefion'' was left out of service in reserve. Following the outbreak of World War I in August 1914, the ''Admiralstab'' ordered ''Gefion'' to be reactivated, and on 10 August ''Korvettenkapitän'' (Corvette Captain) Waldeyer was placed in command of the ship. A crew could not be assembled due to shortages in personnel, however, and so the ship could not be placed back into service. Waldeyer was therefore transferred to another ship on 21 August. ''Gefion'' was thereafter moved to Danzig in 1916 for use as a barracks ship for crews of warships being repaired at the ''Kaiserliche Werft'' there. She remained there for the duration of the war, and was stricken from the Navy Directory on 5 November 1919.Gröner, p. 99 She was thereafter sold to ''Norddeutsche Tiefbaugesellschaft'', converted into a diesel-powered freighter, and renamed ''Adolf Sommerfeld'' in 1920. She had been purchased along with the old pre-dreadnought , from which some material was taken for ''Gefion''s conversion. The ship's magazine (artillery), magazines and most of her machinery spaces were converted into cargo holds. With her new diesel engines, which had come from the unfinished U-boats SM U-115, ''U-115'' and SM U-116, ''U-116'',Rössler, pp. 69–71 she could steam at and had a cargo capacity of . The conversion was not particularly successful, and was only done due to a severe shortage of shipping in the aftermath of the war. As a result, ''Adolf Sommerfeld'' served only very briefly, and was broken up for scrap by ''Danziger Hoch- und Tiefbau'' in Danzig in 1923.Notes
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* {{DEFAULTSORT:Gefion Cruisers of the Imperial German Navy Ships built in Danzig 1893 ships World War I cruisers of Germany Ships built by Schichau