Helmut Rosenbaum was a Korvettenkapitän in Nazi Germany'sKriegsmarine during World War II who commanded U-boat, and the 30th U-boat Flotilla. He received the Knight's Cross of the Iron Cross, awarded to recognize extreme battlefield bravery or successful military leadership. He is credited with the sinking of six ships for a total of and three warships. Born in Döbeln, Rosenbaum joined the Reichsmarine in 1932. After a period of training on surface vessels and service on various U-boats during the Spanish Civil War, he took command of his first U-boat in 1939. After torpedoing and sinking on 11 August 1942, Rosenbaum was appointed commander of the 30th U-boat Flotilla. He was killed in an aircraft crash on 10 May 1944.
Military career
Helmut Rosenbaum began his naval career with the Reichsmarine on 15 August 1932 as a late for the year member of "Crew 32". He underwent basic military training in the 2nd department of the standing ship division of the Baltic Sea in Stralsund. Rosenbaum was then transferred to the training shipEdith, attaining the rank of Seekadett on 4 November 1932. Following a 14-month stay on board the light cruiserKöln he advanced in rank to Fähnrich zur See on 1 January 1934. Rosenbaum then underwent a number of officer training courses at the Naval Academy at Mürwik and Kiel-Wik, including navigational training cruises on the tender Weser and Nordsee, before transferring to the cruiser Königsberg. Following his stay on Königsberg he was promoted to Oberfähnrich zur See on 1 September 1935. Rosenbaum then attended more training courses, including a naval artillery course and an anti U-boat defense course, before being posted to the cruiser Nürnberg. During this assignment Rosenbaum received his officer's commission holding the rank Leutnant zur See as of 1 January 1936. His stay on Nürnberg was interrupted in February and March to attend another training course at Kiel-Wik. Rosenbaum then attended various torpedo courses at the torpedo school in Flensburg from mid October 1936 to end of January 1937. His U-boat training began on 1 February 1937 ending with his assignment as watch officer on in the Saltzwedel Flotilla on 3 April 1937. U-35 at the time was no longer under the command of Hans Rudolf Rösing but rather Hermann Michahelles. From 6 August 1940 to 29 September 1940 he attended construction briefing at the Bremer Vulkanship yard and commissioned U-73 on 30 September 1940 after completing his first two war patrols on. He sank one ship on his first patrol on U-73 in the North Atlantic. On his second patrol on U-73 Rosenbaum departed from Lorient and attacked and sank five ships, returning to St. Nazaire after four weeks at sea. He attacked convoy SC 26 on 3 April 1941 sinking the Alderpool, Indier, Westpool, and British Viscount. The British was sunk on 20 April 1941. In February 1942U-73 was heavily bombed during his first Mediterranean patrol but nevertheless managed to reach La Spezia. In August 1942, on his eighth and final patrol on U-73, Rosenbaum attempted an attack on convoy WS 21S of Operation Pedestal bound for Malta. On 11 August 1942 he made contact and fired four torpedoes at the aircraft carrier. Following his command of U-73 he took command of the 30th U-boat Flotilla on 1 October 1942. At the same time he held the position of Admiralstabsoffizier in the staff of the Admiral of the Black Sea. Helmut Rosenbaum was killed in an airplane crash on 10 May 1944 near Constanţa in Romania as commander of the 30th U-boat Flotilla. Rosenbaum was posthumously promoted to Korvettenkapitän on 3 August 1944 with an effective date as of 1 May 1944.
Summary of career
Ships attacked
As commander of Helmut Rosenbaum is credited with the sinking of six merchantmen for a total of, and three warships, on 11 August 1942, of, and two Motor Launches on board.
