Understand the importance of the periscope in helping U-boat crews spot danger before coming up to the surface. Pupils are challenged to count the number of enemy ships they can spot before the destroyer spots them.
Learn about the Enigma machine, used by the Germans to code and decode messages during World War II as they translate a message.
Explore how a U-boat ascends and descends in water. Stay at the surface for too longand you risk being depth-charged. Increase or decrease the amount of ballast in the tanks to control the submarine's depth.
Explore how sound travels underwater as they are challenged to listen to, and identify, the different sounds that a U-boat hydrophone operator might hear, from shrimps to ships.