http://www.hanggliding.co.za/page2.html

The line from the scooter winch is routed to a pulley that is
situated 1000 meters away. The line then goes around the pulley and taken back
to the winch, the student will then be attached to the towline. This allows the
instructor to chat with the student on the take off and more importantly be
right by their side on their first few tows into the air.