I am planning to buy a GPSMAP 742 and would like to know how far offline the screen can be viewed. I want to flush mount it on the nav-pod on my steering pedestal and I usually sit on the side combing. I will mostly be looking at the screen from a sharp angle to either side and would like to know if the screen can be seen at these angles. I know that some screens can only be viewed from 20º to 30º to ea of square to the face and others can be seen from much farther to each side.