Casquets lighthouses permanently discontinued from 11 May 2011. The South West Tower is topped with a helipad and there is another helipad on a flat section of the rock. The rocks are also marked using racon with a Morse letter T on radar displays. The lighthouse complex was automated in 1990 and is monitored and controlled from the Trinity House Operations Control Centre in Harwich. <br> Casquets lighthouses Casquets Lighthouse is an active lighthouse located on the rocky Les Casquets, Alderney, Channel Islands. Casquets Lighthouse is the latest in a series of three lights on Les Casquets. The first lighthouses started operation
History of lighthouses in Canada where all material and construction costs would be borne by Great Britain. The so-called Imperial Towers were tall conical towers of brick or masonry construction where, in some cases, the granite was quarried and prepared by Scottish stonemasons, and shipped to the colony as ballast. By 1850's standards they must have seemed Imperial, i.e. built to withstand the ages. Henri Maurice Perrault designed lighthouses in Lotbinière, Quebec (1860); Pointe-aux-Trembles, Quebec (1862); L'Islet, Quebec (1865); Port St. Francis, Quebec on Lake St. Peter (1865); Isle aux Prunes opposite Verchères, Quebec (1866); and a movable lighthouse at Isle aux Raisins, Quebec (1867).