"Gordon Wedman" wrote in message news:peVhc.3479$mP2.1092@edtnps89...
I think 10 pounds atop a 4 foot pole that is only 1 1/4 inches will sway and
vibrate a lot. Probably crack the welds after a while. All the movement
will also mess up the radar image. If you braced it with guy wires it might
be OK.
Most of the commercial radar poles are 2 1/2 to 3 inch tubing. Do a search
on garhauer radar pole and edson radar pole. Even these use braces going to
the stern rails.

Thanks - now I recall picking up a 3inch spinnaker boom which I
should be able to use and should be strong enough.