Here are several photos on my solution for radar pole and installing the chart plotter/radar display in the cockpit.
The pole extends inside the locker and is glued to the hull at the bottom. It is also tied to pushpit. I have also installed Navtex, VHF (emergency) and GPS antennas behind the radome.
I believe that a Chart Plotter and Radar display at the navigation desk is useless.
A bent steel plate and a pair of u bolts solved the installation problem to the awkward guardrail of the pedestal.
SO 37.2 - S/V Keyfa - 1997 Alp Tansug