Question, with the 500' rule in mind and the need to fly along the edge of a linear feature to avoid hitting something doing the same in the opposite direction, does that not mean that the minimum height for that part of the river is the 600' of the building + 500' which = 1100'. If that is true how did he hit the crane, or have I got the interpretation of the rules wrong?
I believe the legislation says "within 500 ft of" so (legally subject to the rule to alight clear in event of engine failure) so long as you are not within 500 ft of the obstruction you are in compliance.