The Series 70M Double lens Navigation lights are applicable for all vessels ≥ 20 m in length. The Navigation lights fulfil all requirements of International Regulations for Preventing Collisions at Sea 1972 (COLREG) are published by the International Maritime Organization (IMO) and local rules. The high quality Series 70M are virtually unbreakable and extremely reliable. Their nonmagnetic and seawater resistant polycarbonate housing is self-ventilated and the tungsten bulbs can be changed easily with only one hand. The main and stand-by light is included in one housing.