Originally Posted by
megan
From the radar pics below might the helo pilots have their attention outside of the cockpit searching for the traffic, with no one minding the store (instrument scan break down) they unwittingly climb a 100 feet from their previous 200 feet.
It hasn't necessarily climbed 100 feet. sinc display resolution is only 100ft it could be that it climbed from 240 to 260ft between these two screens. Besides this it also shows how ludicrous this 100ft vertical separation in this case was. Even the ATC screens resolution do not really support this level of separation. 245ft would still have shown as 002 and if in the middle of the Potomac the 3° G/S would be already lower than this.