The FA HWB site is part of Stützpunkt 161 Bumerang, a German military installation located in Audinghen, France. This coastal defense position was constructed during World War II as part of the Atlantic Wall fortifications. The site features reinforced concrete structures typical of German military engineering from the period, designed to withstand artillery bombardment and provide secure shelter for personnel and equipment.
Situated along the French coastline, it formed part of the extensive network of bunkers and defensive positions built to protect against Allied invasion.