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7.11 Which statement concerning wing tip
vortices is false?
- Vortices normally settle below and behind the
aircraft.
- With a light cross wind, one vortex can remain
stationary over the ground for some time.
- Lateral movement of vortices, even in a no wind
condition, may place a vortex core over a parallel
runway.
- Vortices are caused directly by "jet wash".
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