In November 1940, Von Müllenheim-Rechberg was sent to the Naval Gunnery School at Wik to complete his heavy gun training courses, which ended his position as Lindemann's personal adjutant. Lindemann's new adjutant was the signals officer Second Lieutenant Wolfgang Reiner. "Bismarck"s heavy guns were first test-fired in the second half of November, and "Bismarck" was shown to be a very stable gun platform. After the 1940 Christmas celebration on board, Lindemann and the majority of the officers, non-commissioned officers and sailors went on home leave. First gunnery officer Lieutenant Commander Adalbert Schneider relieved Lindemann as "Bismarck"s commander during his absence. Lindemann spent his leave with his wife and daughter and returned on 1 January 1941.