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
Lighthouses on the Isle of Arran rebuilt between 1821 and 1830. Pladda was one of Northern Lights' lighthouses where paraffin as a new fuel together with multiple wicks were tested successfully in 1870. This allowed substantial savings with a simultaneous increase in power between 10% and 100%. Fog signals were introduced in the 1870s as well. In 1901, the formerly fixed light was changed to a more powerful group-flashing which was Northern Light's plan for most Scottish lighthouses at the time. Pladda lighthouse operates fully automatic since 1990. Pladdas position is 55° 25.512'N, 005° 07.113'W. Its light flashes Fl.(3)30s40m23M. The Inner lighthouse on Holy Isle faces