SOLAS requires one of these markers to be mounted on each bridge wing attached to a 4kg lifebuoy. Mounted in its steel bracket on each bridge wing attached to a lifebuoy. Signal can be mounted up to 56m above sea level. (SOLAS only requires>30m). Produces dense orange smoke for 15 minutes and 2 LED lights burn at 2 candela for 2 hours minimum. Signals location of a man overboard by day or night.