Radar Arch Boat Stability 20’ Crestliner

[Hazmat480]

I have a 1989 Crestliner Sabre 20’ with 8’ beam. I acquired some 2” stainless steel tubing for free and am thinking about building a radar arch. When it is complete the height will be about 5’ above the gunwales so that it will clear the Bimini top when it is up. I have drawn it up and calculated it’s weight to be about 120 lbs with radar, antenna, lights, etc. I am a little worried about how it will affect stability. Any thoughts? I am also thinking about building a simple mast instead for the radar but trying to decide where to mount it so it would be out of the way for fishing.

 

[Texasmark]

I'd mount it to the side of the steering/instrument console with a flange screw mounted to the floor (deck) and support brackets, 2 at least supporting it against the console. I have super large unbrellas I use in the summer and I mounted a support pole for them in this location and it's perfect for bow seat casting or other places in the boat except for some casting directions from the drivers seat.