RC U-boat Built by Martin Pryor. 1/32 scale, 83 inches (2.1m) long
Sound effect include, diesel engine startup, crewmen issuing orders, bells ringing.

Martin Pryor talking about the model
   • Martins Models   OTW Type VII U Boat  

History
Type VII U-boats were the most common type of German World War II U-boat. 703 boats were built by the end of the war. The lone surviving example, U-995, is on display at the Laboe Naval Memorial located in Laboe, Schleswig-Holstein, Germany.
Wikipedia