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
Caloundra Lighthouses who constructed additional lightstatons and made substantial upgrades to existing lights, with many lighthouses converted to unattended acetylene lights. The bulk of the expenditure was concentrated north of Cooktown where seven new lighthouses were constructed to guide ships through the Torres Strait and the Great Barrier Reef. Manned lighthouses were phased out in favour of less expensive, utilitarian-designed, unmanned structures. Caloundra Head Lighthouse continued to signal the entrance to the North West Channel to the Port of Brisbane and by 1929 investment in new navigation marks and dredging to increase the depth of the channel ensured that most of the