Danlayer
![HMS Sir Galahad, a Round Table class trawler displacing 440 long tons, was converted to a danlayer in 1944 and used to support the Normandy landings.](/Images/godic/202501/07/HMS_Sir_Galahad2439.jpg")
A danlayer was a type of vessel assigned to minesweeping flotillas during and immediately after World War II. They were usually small trawlers, fitted for the purpose of laying dans. A dan is a marker buoy which consists of a long pole moored to the seabed and fitted to float vertically, usually with a coded flag at the top.