Attwood Vertical Boat Transom Navigation Light w Flush Mount This Attwood Vertical Boat Transom Navigation Light w Flush Mount features a translucent body made up of 304 stainless steel with a plastic body and watertight lamp socket. It provides 2-mile, 135 degree transom visibility and includes one 7.5-watt lamp and two stainless steel 10 screws. Designed for pleasure craft up to 164 ft. 50 meters in length, this boat transom navigation light features a rubber gasket that seals the lens and bod