Background
Tamm was born in Film, Uppsala County, Sweden and was the son of the Over-Governor of Stockholm and cabinet minister baron Claës Gustaf Adolf Tamm and Ebba, née Tersmeden.
Tamm was born in Film, Uppsala County, Sweden and was the son of the Over-Governor of Stockholm and cabinet minister baron Claës Gustaf Adolf Tamm and Ebba, née Tersmeden.
He became a second lieutenant in the Swedish Navy in 1899 and sub-lieutenant in 1901. Tamm was promoted to lieutenant in 1907 and was adjutant and librarian at Sjökrigsskolan as well as teacher in law of war and maritime law from 1907 to 1910 and in naval warfare from 1910. He was adjutant at the Command Expedition of the Ministry for Naval Affairs from 1911.
Tamm was naval attaché in Berlin and Copenhagen from 1914 to 1917, secretary in Royal Swedish Society of Naval Sciences from 1918 to 1921 and was head of Sjökrigsskolan from 1921 to 1925.
He was promoted to flag captain in 1930 and was an expert at the World Disarmament Conference in Geneva in 1932. Tamm was head of the Command Expedition of the Ministry for Naval Affairs from 1931 to 1933 and Chief of the Coastal Fleet (Kustflottan) from 1933 to 1939.
He was promoted to vice admiral in 1939 and was Chief of the Navy from 1939 to 1945. He was appointed admiral in the reserve in 1947, two years after he left active service.
Tamm"s awards: Commander Grand Cross of the Order of the Sword Knight of the Order of the Polar Star Knight of the Order of Vasa Grand Cross of the Order of the Crown of Italy Grand Cross of the Order of the Three Stars Grand Officer of the Order of the German Eagle Commander 1st Class of the Order of the Dannebrog Commander 1st Class of the Order of the White Rose of Finland Commander with Star of the Order of Saint Olav Commander 1st Class of the Order of Polonia Restituta Commander 2nd Class of the Order of del Mérito Naval Officer of the Order of Saints Maurice and Lazarus Knight 1st Class of the Order of the Griffon Knight 3rd Class of the Order of the Crown Knight 3rd Class of the Order of Saint Anna King Gustaf V"s Olympic commemorative medal (Konung Gustaf V:s olympiska minnesmedalj) Swedish Voluntary Motorboat Corps" Gold Medal (Sveriges frivilliga motorbåtskårs guldmedalj) Finnish Defense Corps" cross of merit (Finska skyddskårernas förtjänstkors).
Tamm was then head of department at the Naval Staff in 1926, was promoted to captain in 1927 and was a member of the Defense Committee in 1928 and 1929. In 1914, Tamm became a member of the Royal Swedish Society of Naval Sciences (honorary member in 1933) and in 1925 he became a member of the Royal Swedish Academy of War Sciences.
