Context : Heinz-Otto Schultze (13 September 1915 in Kiel -- 25 November 1943 in the South Atlantic) was a German U-boat commander in World War II and recipient of the Knight's Cross of the Iron Cross (Ritterkreuz des Eisernen Kreuzes). 
Answer : Knight's Cross of the Iron Cross
Which award was honoured to Heinz-Otto Schultze?