Shy... Flying in my 109 ( not a Power so may not be relevant ) it can sometimes be hard to see to the left if the screen mists up , as you can only reach the part of it directly in front of you to wipe clean . Having said that it should only happen during the early part of a flight if the heater is working . I also think if you had poor viz you would drop down and fly slow down the middle of the river . I have had icing and it certainly didn't happen quickly and a pilot of his experience would deal with it . Also it was fog which I don't think forms ice too quickly .
Question . Why do they not put transponders on top of such structures . V easy to do . V cheap to do .