To improve detection of enemy movements, the range-finding post was backed up by two observation posts located a few kilometres east and west of the battery. Had the batteries been equipped with radar, they would have been highly effective, but as it was, not one battery in Calvados was so equipped. There were radar stations nearby at Douvres-la- Delivrande, Arromanches and at the Point de la Percee, but these stations were not controlled from the sea front and, even if they were able to inform the battery of the co-ordinates of any enemy target, this system turned out to be patently ineffective as the radar station reported first to its superiors.
German radar station map room
In any case, by the spring of 1944, following intensive Allied bombing raids, the radar stations were no longer operational. On the morning of the D-Day landings, 74 out of the 92 radar stations in Normandy had been put out of action. To make up for the difficulty of firing at night, the battery was equipped with to powerful 150cm searchlights, one to the east and one to the west of the control bunker which were individually operated from concrete covered installations. These searchlights were practically vulnerable, however, as one well imagines.