Make Your Present Heading A Radar Heading
this makes complete sense in exactly 1 case:
imagine the pilot is avoiding CBs.
The controller approved "avoidance to the left/right approved" although there is conflicting traffic somewhere in the area.
Once the controller sees the avoidance heading of the pilot, he re-analyizes the potential conflict and finds out that it will be best that the aircraft avoiding CBs stays on its present, self-chosen heading.
Because the present heading of the aircraft wasn't assigned by the controller but picked up freely by the pilot, the only way to
clarify the responsibilities and to prevent the pilot from altering his avoidance heading again is by transmitting:
"continue present heading as radar heading", cause avoiding CBs is legally considered "own navigation" of a pilot.
Hope it all makes a bit of sense!
