The S446 was a substantial bunker, which was a Kriegsmarine type designed to accommodate a 10 meter naval rangefinder. It did not contain any accommodation, rather this was provided separate. One example was built on Guernsey, at M.K.B. Mirus. The Mirus Leitstand has been altered significantly post war, and integrated into a house, and is not accessible.
Known Examples:
m³ of Concrete Required:
1600