Background
Casquets Lighthouse is located on rocks 13km northwest of Alderney in the English Channel. The Casquets area has been the scene of many shipping incidents in the past. There are three towers that were originally built in the 18th century at the Casquets which are still in use, and the North West Tower was equipped with tungsten‐halogen lamps.
The light is 37 metres above Mean Sea Level in the 23 metres high North West Tower and flashes five times every 30 seconds with flashes 3.7 seconds apart. Under a two‐year modernisation project, Trinity House has upgraded the light to utilise renewable energy sources.