Perko Combo Masthead Boat Navigation Light This Perko Combo Masthead Boat Navigation Light features a reduced glare design with a chrome plated Zinc Alloy top. It is certified to be used on sail or power driven vessels under 20 meters 65.6 ft in length. With a folding windshield mount light and notches for through base wiring, this boat navigation light presents exceptional use and great satisfaction. It also features polymer adapters for horizontal or vertical mounting options. Features Reduced