verify specific direction of takeoff (or turns after takeoff)

Used by ATC to ascertain an aircraft’s direction of takeoff
and/or direction of turn after takeoff. It is normally used
for IFR departures from an airport not having a control
tower. When direct communication with the pilot is not
possible, the request and information may be relayed through
an FSS, dispatcher or by other means. See IFR takeoff
minimums and departure procedures.