The Atlantik Wall In Normandy



Wn379 Beaumont Hague K9 Map 1110E

During the early days all the X-Gerat beams came from Mount Couple near Calais, but later when the Y-Gerat system was introduced the intercepting beams came from three different transmitters. Below are listed the Y-Gerat stations, and the beams used. (Plan is the extreme right hand photo)

The first of these cross beams (A) called Rhein, which was transmitted from Cleve in Germany, told the aircraft that they were 50 kms (30 miles) from their target.

On crossing the second beam (B) called Oder transmitted from Julianadorp in the Netherlands, told the aircraft observer to press the button to start the bombing clock.

The distance to the target is now 15 kms (9 miles)

When the aircraft intercepts beam (C) called Elbe, this beam originated from Bredstedt in Northern Germany. On hearing the beam the aircraft observer stops the bombing clock, it is now 5 kms (3 miles) to the target. The second hand continues to sweep and when it is aligned to the other hand, an electrical contact is switched and the bombs are released.


Wn379 Luftwaffe station K9 E Works - Water reservoir - Knickenbein FuSAn 721- (Later a Sea Elephant)


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