The SL-155 is a 6-13NM mid-range marine lantern available in 2.5, 5 or 10-degree vertical distributions. The single tier SL-155 with multiple intensity adjustments, high levels of efficiency, and minimal wind loading offers significant advantages over competitor’s lens stack assemblies. The SL-155 lanterns are available with a class-leading integrated, low powered Type 1 or Type 3 AIS. When fitted, the AIS is encapsulated within the body of the SL-155 to maintain the weatherproof integrity and come standard with GPS.