Regelbau S449 is a Bunker for Measuring post for medium and heavy coastal battery.
Würzburg radar was the primary ground-based gun laying radar for the Wehrmacht's Luftwaffe and Heer (German Army) during World War II. Initial development took place before the war and the apparatus entered service in 1940. Eventually over 4,000 Würzburgs of various models were produced. It took its name from the city of Würzburg.
At the beginning of the war, the Germans required two Battery Observation Posts to calculate the range of a target at sea. The distance between these two was known and the target's range could therefore easily be calculated by simple trigonometry using bearings from each post. For this purpose, the German Navy built on Observation Post at Bulbjerg, 15 km. east of the big gun battery in Hanstholm. The only drawback to the system was visibility, requiring the target to be observed and assistance in bad weather or at night. For this, a Würtzburg Riese radar was set up in 1944. At the same time, a bunker (S449) was built on the top of Bulbjerg for the observations.
Simultaneously, in the autumn of 1942, the German army began to build a defensive stronghold on the main road 2 km. southeast of Bulbjerg. At this point there was a natural bottleneck in the terrain through which all east/west traffic had to pass. In the stronghold, more than 25 bunkers were built to defend against infantry and tanks. The entire area was equipped with anti-tank trenches and barbed wire barriers that optimized the fire from the individual positions.
Today, it is still possible to see the many bunkers and excavations and there is an exhibition in the crew bunker on the top of Bulbjerg.
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