radar upgrade

I'm getting ready to mount a Raymarine Quantum 2 on a 2003 320 sundancer that has not had radar before. On the radar arch there is a flat spot in the center, does anyone know if it is already set to the appropriate degree so the radar is correct when on plane? If I need to add a wedge or washers...

I currently have a Raymarine Dome Radar. I am thinking about upgrading to a Raymarine Open Array Scanner OR selling the radar dome itself all together. I have a few questions: 1) If staying within the lower 48 inner coastal rivers, with very few trips to the bay.. is a radar even necessary? 2)...

I have recently purhased a 2000 - SR410da with a complete RayMarine electronics package, albeit 12 year old stuff. I would like to upgrade the Radar and GPS. I operate mainly in the Upper Mississippi area. Present equipment is: Ray Pilot 650; Ray Chart 601xx; R41xx Raster Scanner Radar; Nav 398...