All the Captains I know here on flybridge yachts drive from the flybridge unless there is bad weather (and when there is bad weather the owner usually wants to go home
).
On the older yachts its always funny to see such a nice array of wheelhouse electronics which are rarely used here and the flybridge has just the basics.
Radars can have a vertical angle of about 25 degrees and even be 10kW. No idea if its bad for the health. I think we will learn more about cell phones and other transmitters effect on our health in years to come.