Otto Ciliax (30 October 1891 12 December 1964) was an admiral in the German Navy. He was also a recipient of the Knight's Cross of the Iron Cross. The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership. As the Watch-Officer of SM U-52 in World War I he sank the cruiser HMS Nottingham. He was a former captain of Scharnhorst. In February 1942, he commanded Operation Cerberus, better known as "the Channel Dash", when Germany's two battleships, Scharnhorst and Gneisenau and the heavy cruiser Prinz Eugen and a number of other smaller vessels were transferred from Brest to their respective home bases in Germany for planned deployment to Norwegian waters.