Foreland Battery, which were the only guns which could be directed by radar but the 10-cm S band set had only recently been installed and had never been used in conjunction with the guns. As the visibility was only , it was hoped that the radar would be able to register the splashes as the shells landed so that the guns would be able to correct their aim but nothing was detected. After firing three two-gun salvoes without being able to detect the "fall of shot" – the shells were actually landing almost a mile astern of the main German ships – it was decided to fire full salvoes using only the ranging information from the radar. After six minutes of rapid fire, the last shots were fired at a range of . None of the 33 shells fired came close to the German ships. A minute before the last shots were fired, South Foreland came under counter-battery fire from across the Channel but little damage was sustained. Final duels During the Anglo-Canadian operation to capture Calais, on 26 September 1944 (the last day of shelling) fifty shells were fired, killing five people, the last of whom was 63-year-old Patience Ransley, who was killed by a shell from the Lindemann Battery while sheltering in the long "Barwick's Cave" reinforced cliff tunnel. Accurate bombardment from the British heavy guns at Dover disabled the Grosser Kurfürst Battery at Floringzelle near Cap Gris Nez, ending the duels. Dover was finally freed from bombardment and to mark the event the town's mayor was sent a German flag from the batteries. Legacy Between Calais and Boulogne-sur-Mer considerable parts of the concrete gun emplacements and associated bunkers remain accessible, although often in somewhat dangerous conditions. One of the casemates of the Todt Battery can be visited at the Musée du Mur de l'Atlantique'', the Atlantic Wall Museum, at Audinghen. One of the Krupp K5 guns is also there. Since 1954, a section of painted armour plating taken as a war trophy from a turret of the Lindemann Battery has been on display on the Dover seafront. Many of the British batteries remained until the decision was taken to retire all the coastal artillery in 1956. The big 15-inch guns at Wanstone Farm were not removed until 1959. The sites have either been demolished, buried or left to decay. At Wanstone Farm Battery, ancillary buildings such as