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
The Maidens lighthouses Attendant as well as from the headquarters of the Commissioners of Irish Lights at Dún Laoghaire. A racon showing Morse code "M" (--) was added in 1996. The light's nominal range was reduced from 24 to 23 nautical miles in September 2010 and the light characteristic was set at three white flashes every 15 seconds (Fl (3) W 15s). The lighthouse buildings remain in good repair. The Maidens lighthouses The Maidens lighthouses, on the Maidens in North Channel off County Antrim in Northern Ireland, date from 1829 and were built at the request of merchants and a Royal Navy officer.