Originally Posted by
Smokey Lomcevak
Was the left turn after departure what the crew were expecting? If not - was their mental model deficient?
The departure issued is: Kennedy Five fly runway heading radar vectors to GREKI climb 5000 initially.
One problem with the 100 heading is Shamrock is probably expecting to stay on that heading for 5 miles while ATC would have soon after given another turn to 050 or something more towards the north.
Pilots plan a heading 10 or 15 miles ahead regarding weather. So ATC can say keep the turn tight i'll soon give you a further turn. Or how far out is the cell you are talking about would make sense. Or just give the turn around in one go, which is problematic as the preceding plane may have had insufficient separation to do that.