Jachmann, Eduard Karl Emanuel, German seaman, was born at Danzig in 1822, and became a captain in 1859. In 1862 he commanded the Thetis in an expedition to Eastern Asia, and in 1864 commanded the Prussian squadron at the battle of Jasmund. For this he was promoted to be rear-admiral. From 1864 to 1867 he was port-admiral at Kiel, in 1868 he was made vice-admiral, in 1871 he became commander-in-chief of the German navy, and in 1873 he retired. He died in 1887.