USCG certified for use on sail or power driven vessels under 20 meters (65.6 ft.) in length. 2-mile visibility. Replacement stowaway plug-in type w/gold plated contacts. Fits Perko 2-pin bases: 1059, 1060, 1046, 1047, and 1045. 12V bulb included. Bases not included.. Pole replacement for series: 1430, 1630, 1631, 1640 and 1660 lights.