Terny-Sorny is a village northwest of Margival. It lies outside the defence circle of the Führerheadquarters. That is why only two 502 personnel bunkers were built here. North of Sorny on the highest point (161 meters) lies Flakstellung D. Contrary to the other Flakstellungen this one has been demolished almost completely except for the (rare) St bunkers.
One of the many texts inside the L 424 of Flakstellung D which indicates which equipment was on the wall. In this case 'Aufnahme' next to a telephone.