FireBird Z-One DHV 1 Manuel page 70

Function:
Because of the tension applied through the tow rope/quick release/accelerator,
the glider will automatically be accelerated.
During inflation, if the tow rope is already tensioned the glider will be
accelerated and some pilot input may be required to brake the canopy as it
rises.
Glider will be
accelerated
Connection towing
support acceleration line
Connection to
quick release
Harnes
Karabiner