Due to poor english
...the conclusions of Polish AAIB were:
- ATC selecting wrong method of separation, horizontal, instead of vertical
- ATC giving command to EMB170 to sink from FL270 to 2700ft, when EMB 145 was climbing to FL210
- ATC lack of effective actions to secure separation when recognizing conflict (not using word "immediately")
I don't see any relation to
"poor english"...
Just poor performance and poor judgement of the ATC...
