Discovery Bi-Colour LED Navigation Light – Vessels Up To 20M – 12/24VAn Osculati discovery light suitable for vessels up to 20m long. This light comes with both port and starboard lights and each light covers a 112. 5 degree angle. This navigation light benefits from LED lighting, keeping power consumption to a minimum, while meeting the relevant COLREG72 requirements. The light is suitable for both 12 and 24 volts systems and is installed by twisting to remove the top part of the light (after first removing the