Scanstrut - 6" Aluminum PowerTower f/Open Array Raymarine (4'), Furuno (2') & Navico HALO (3', 4', 6') - APT6003. Pre-drilled mounting holes allow the radar to fasten straight to the PowerTower with its own mounting bolts.. Marine sealant not required. Paint finishes complies with our unique 4 step marine paint system. Features:. Expertly designed to install your antenna on the cabin roof, flybridge or radar arch of your powerboat. Achieve a clear view of the horizon for maximum antenna performance 150mm (6") tall. Compatible with Raymarine, Furuno and Navico Open Array