sentences:  Reinhard Hardegen (Crew 33), who was relieved in turn on 1 August 1942 by his watch officer, "Oberleutnant zur See" Horst von Schroeter (Crew 37b).He remained in command until the boat was decommissioned in 1944.German Type IXB submarines were slightly larger than the original German Type IX submarines, later designated IXA.