Background
The 10.5cm SK C/32 (SK - Schnelladekanone (quick loading cannon) C - Construktionsjahr (year of design) was a German naval gun used in World War II. This was the standard unshielded low-angle deck gun mounted forward of the conning tower in Type I, Type IX and Type X U-boats. The guns were also used in shielded high-angle mountings aboard type 35 and type 43 minesweepers, Elbing class torpedo boats, cruiser Emden, and old battleships Schlesien and Schleswig-Holstein. The LC/32 mounting used in Type I and early Type IX U-boats weighed about 5 tons and could be elevated from -10° to +35°. Later Type IX and Type XB U-boats used the LC/36 mounting reducing weight by 10 percent by restricting elevation from -10° to +30°. During the early war years, these guns were used to encourage surrender of independently routed merchant ships or to sink ships damaged by torpedoes. The rate of fire with a good crew was 15 to 18 rounds per minute.