Attwood Anchor Masthead 12 LED Boat Navigation Light This Attwood Anchor Masthead 12 LED Boat Navigation Light is designed for the harsh coastal marine environment with its blend of enhanced 316 stainless steel alloy and its corrosion resistant composites with stainless steel accents. The lights are rated for 50,000 hours of use and are equipped with a durable folding base cast. For use on boats up to 65.6 ft. 20 meters, this boat navigation light achieves 3NM of 360 visibility while drawing a f