Expertly designed to install your antenna on the cabin roof, flybridge or radar arch of your motorboat, provides a clear view of the horizon for maximum antenna performance. Pre-drilled mounting holes, the antenna attaches to the power tower top plate with its own mounting screws. Internally mounted Scanstrut DS30 cable gasket Marine seal not required. No need to cut cables and remove plugs. Includes inserts to fit cables of all standard radioms.