The Lifebuoy Marker is normally mounted on a Ships Bridgewing attached to a 4 kg Lifebuoy. It is automatically or manually deployed to mark the position of a person in the water by day or night. Featuring a self-activated lighting system which exceeds SOLAS requirements for 2 candela light output and 2 hours duration, plus providing 15 minutes of dense orange smoke. Ships are required to fit at least two markers.