3. Radar map

Part of a larger radar map from the Ringelnatter (Adder) radar station at Houvig.

Radar maps were used to plot targets; in the same way, you plot targets when you play “Battleships”. Using the map, operators tracked German and enemy (in this case, allied) aircraft flight paths across the North Sea and West Jutland.

Even though the radar map is torn, it is an incredibly well preserved artefact of bunker history.