Z14 Friedrich Ihn was a built for Nazi Germany's Kriegsmarine in the mid-1930s. The ship was named after the First World War German naval officer Friedrich Ihn. At the beginning of World War II, the ship was initially deployed to blockade the Polish coast, but she was quickly transferred to the German Bight to lay defensive minefields in German waters. In late 1939 and early 1940, the ship laid multiple offensive minefields off the English coast that claimed 18 merchant ships and a destroyer. Ihn was under repair during the Norwegian Campaign of early 1940 and was transferred to France later that year.
After a lengthy refit in Germany, she returned to France in early 1941 where she escorted returning warships, commerce raiders, and supply ships through the Bay of Biscay for several months. She remained in Germany for the rest of the year after returning in July. The ship was transferred to France in early 1942 to escort the capital ships as they sailed through the English Channel to return to Germany (the Channel Dash). Ihn was then transferred to Norway where she participated in several unsuccessful attacks on convoys to the Soviet Union. Afterwards she returned to Germany and remained there for the rest of the year. The ship spent most of 1943 in the northern Norway although she was mostly inactive because of fuel shortages. Ihn was ordered home for a long refit late in the year and she was sent to southern Norway upon its completion in mid-1944. The ship remained there for the rest of the war, although she made several trips to evacuate refugees from East Prussia in the last days of the war.
Ihn was eventually allocated to the Soviets when the surviving warships were divided between the Allies after the war. Little is known about her service with the Soviet Navy and she was probably scrapped sometime in the 1960s.
Design and description Friedrich Ihn had an overall length of and was long at the waterline. The ship had a beam of , and a maximum draft of . She displaced at standard and at deep load. The Wagner geared steam turbines were designed to produce which would propel the ship at . Steam was provided to the turbines by six high-pressure Benson boilersGröner, p. 199 with superheaters. Friedrich Ihn carried a maximum of of fuel oil which was intended to give a range of at , but the ship proved top-heavy in service and 30% of the fuel had to be retained as ballast low in the ship.Whitley, p. 18 The effective range proved to be only at .Koop & Schmolke, p. 26 The ship's crew consisted of 10 officers and 315 sailors.
Friedrich Ihn carried five 12.7 cm SK C/34 guns in single mounts with gun shields, two each superimposed, fore and aft. The fifth gun was carried on top of the rear deckhouse. Her anti-aircraft armament consisted of four 3.7 cm SK C/30 guns in two twin mounts abreast the rear funnel and six 2 cm C/30 guns in single mounts. The ship carried eight above-water torpedo tubes in two power-operated mounts. A pair of reload torpedoes were provided for each mount.Whitley, p. 68 Four depth charge throwers were mounted on the sides of the rear deckhouse and they were supplemented by six racks for individual depth charges on the sides of the stern. Sufficient depth charges were carried for either two or four patterns of sixteen charges each.Whitley, p. 215 Mine rails could be fitted on the rear deck that had a maximum capacity of sixty mines. 'GHG' (Gruppenhorchgerät) passive hydrophones were fitted to detect submarines and an active sonar system was installed by February 1941.Whitley, p. 72
Modifications During the war the ship's light anti-aircraft armament was augmented several times. In April 1941, improved 2 cm C/38 guns replaced the original C/30 guns and three additional guns were added. The two guns on the aft shelter deck were replaced at some point by a single 2 cm quadruple mount, probably in 1942. Sometime in 1944–45, Z14 Friedrich Ihn received a partial "Barbara" anti-aircraft refit where twin 2 cm mounts replaced her singles, giving her a total of eighteen 2 cm barrels.Whitley, pp. 73, 75
Construction and career Friedrich Ihn, named after the commander of the torpedo boat , who was killed during the Battle of Jutland in 1916, was ordered on 19 January 1935 from Blohm & Voss. She was laid down at their shipyard in Hamburg on 30 May 1935 as yard number B503, launched on 5 November 1935 and completed on 6 April 1938.Whitley, p. 205 The ship participated in the August 1938 Fleet Review as part of the 3rd Destroyer Division. On 23–24 March 1939, Friedrich Ihn was one of the destroyers escorting Adolf Hitler aboard the pocket battleship as the Germans occupied Memel.Koop & Schmolke, p. 97 She participated in the Spring fleet exercise in the western Mediterranean and made several visits to Spanish and Moroccan ports in April and May.Whitley, p. 81
When World War II began, Friedrich Ihn was initially deployed in the Baltic to operate against the Polish Navy and to enforce a blockade of Poland, but she was soon transferred to the German Bight where she joined her sister ships in laying defensive minefields.Rohwer, p. 2 She also patrolled the Skagerrak to inspect neutral shipping for contraband goods in October. The ship was scheduled to conduct a minelaying operation off the British coast in early November, but it was cancelled when one of the other destroyers assigned to participate suffered machinery problems from contaminated fuel oil.Whitley, p. 87
On the night of 12/13 December, German destroyers sortied to lay minefields off the British coast. Under the command of Commodore (Kommodore) Friedrich BonteHervieux, p. 113 in his flagship Hermann Künne, Friedrich Ihn, Bruno Heinemann, Richard Beitzen, and Erich Steinbrinck laid 240 mines off the mouth of the River Tyne, where the navigation lights were still lit.Whitley, p. 91 The British were unaware of the minefield's existence and lost eleven ships totaling .Rohwer, p. 11 The destroyers were later ordered to escort the crippled light cruisers and which had been torpedoed by the submarine while covering the destroyers' withdrawal. Ihn and Steinbrinck had machinery problems en route and were forced to return to port before they reached the cruisers. Ihn and her sisters Friedrich Eckoldt and Steinbrinck sortied again on the night of 18 December, but the British had turned off the navigation lights off Orfordness and the German were forced to abandon the attempt because they could not locate themselves precisely enough to lay the minefield in the proper position.Whitley, pp. 91–92
1940 Another minefield of 170 magnetic mines was laid by Ihn, Eckolt, and her sister Steinbrinck on the night of 6/7 January 1940 off the Thames Estuary. The destroyer and six merchant ships totalling 21,617 GRT were lost to this minefield as well and another ship was damaged as well.Rohwer, p. 13 Bonte led a destroyer minelaying sortie to the Newcastle area on the night of 10/11 January with Ihn, Heidkamp, Eckoldt, Anton Schmitt, Beitzen, and Karl Galster. Ihn had problems with her boilers that reduced her maximum speed to and she had to be escorted back to Germany by Beitzen. This minefield only claimed one fishing trawler of 251 tons.Whitley, p. 92
Ihn was under repairs during Operation Weserübung in April and did not leave the dockyard until May when she began working up as part of the 5th Destroyer Flotilla. The flotilla was transferred to the Atlantic Coast of France in early September and was attacked by Bristol Blenheim bombers of the Royal Air Force on 11 September while crossing the Baie de la Seine without result, although Ihn was near-missed. Now based at BrestWhitley, pp. 97, 105–06 the flotilla laid a minefield in Falmouth Bay during the night of 28/29 September. Five ships totalling only 2,026 GRT were sunk by this minefield.Hervieux, p. 115 Led by Kapitän zur See Erich Bey, Ihn and four other destroyers sortied for the Southwest Approaches on 17 October and were intercepted by a British force of two light cruisers and five destroyers. The British opened fire at extreme range and were forced to disengage in the face of long-range torpedo volleys and attacks by Luftwaffe bombers without having hit any of the German ships. Ihn returned home on 7 November for a refit in Stettin.Whitley, pp. 107–10
Her refit was completed in late January 1941, but she was trapped by thick ice so that she could not reach Gotenhafen to work up until mid-February.Whitley, p. 115 Ihn returned to France in April where she was based at La Pallice. There she was primarily occupied with escorting returning commerce raiders, warships and supply ships through the Bay of Biscay to bases in France. These included the raider Thor on 22 April, the supply ship Nordland, and the fleet oiler Ermland in late May. The heavy cruiser was escorted to Brest in early June after separating from the battleship during Operation Rheinübung. Ihn sailed from Brest on 27 July for another refit and was ineffectually attacked by British motor torpedo boats (MTB) off Calais that same day.Whitley, pp. 115–16
1942 The ship remained in German waters for the rest of the year after completing her refit. She was sent to Brest in February 1942 to escort the battleships and , as well as Prinz Eugen through the English Channel back to Germany (Operation Cerberus). During the voyage, Ihn twice engaged British MTBs and shot down two Fairey Swordfish torpedo bombers. Shortly afterwards, the ship joined four other destroyers in escorting Prinz Eugen and the heavy cruiser to Trondheim, Norway. Heavy weather forced Ihn and two other destroyers to return to port before reaching Trondheim and Prinz Eugen was badly damaged by a British submarine after their separation.Whitley, pp. 118–19, 132–33
On 6 March, the battleship , escorted by Ihn and three other destroyers, sortied to attack the returning Convoy QP 8 and the Russia-bound PQ 12 as part of Operation Sportpalast (Sports Palace). That night the weather worsened and Ihn suffered some damage to her bridge and forward gun mount from high waves. The following morning, Admiral Otto Ciliax, commanding the operation, ordered the destroyers to search independently for Allied ships and they stumbled across the Soviet freighter , a straggler from QP 8 later that afternoon and sank her. Tirpitz rejoined them shortly afterwards and Ciliax ordered Ihn to Harstad to refuel. The destroyer rejoined the battleship in the morning and was able to shoot down one of five Fairey Albacore torpedo bombersWhitley, pp. 133–34 from the aircraft carrier Rohwer, p. 149 that unsuccessfully attacked the German ships at 10:20. Two hours later both ships arrived back in port.Whitley, pp. 134–35
By May, Ihn was flagship of Captain Fritz Berger of the 5th Destroyer Flotilla and she was assigned to escort Tirpitz during Operation Rösselsprung (Knight's Move), the attack on the Russia-bound Convoy PQ 17. The ships sailed from Trondheim on 2 July for the first stage of the operation, although all three of the other destroyers assigned to Tirpitzs escort ran aground in the dark and heavy fog and were forced to return to port for repairs. Tirpitz, the heavy cruiser and Ihn arrived at Altafjord on 4 July, but they were recalled shortly after sortieing on the 5th and never engaged any Allied ships. She escorted Galster, one of the destroyers that had run aground, back to Germany on 12 July.Whitley, pp. 140–41
1943–1945