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--------------------------@
This is your Fourth Hang-Gliding lesson, in this lesson you will learn
the effects of wind and ridge.

In this flight you will face a strong head wind, this wind will slow
your relative progress along the ground thus making your glide path
steeper than normal, however when you pass over a ridge this wind turns
upwards in sutch strength that you feel like you are in an elevator.
When the ridge effect is over again your glide path becomes steep
and you quickly loose all the altitude you have gained.

To complete this lesson you have to pass through all the checkpoints
on your way down, don't push or pull, simply let the elements of
nature take thier action and watch their effect.
