See Flysurfer's Full Depower Safety (FDS) in action. When activating the FDS System (5th line) a Flysurfer kites goes into safety mode.

Safety:
Whether you ride unhooked, spin, try a water relaunch for the first time or practice a handle pass, all manoeuvres, including the latest tricks, can now be performed with the Total Depower Bar with FDS System (5th line). As soon as you activate the quickrelease, or unhook and let go of the bar, the kite is completely de-powered and comes down without twisting the lines.

Relaunch:
The FDS System allows you to re-launch without having to swim towards the kite or untangle lines. From the nose down position, simply hook into the depowerloop and slide the FDS line through the bar and perform a normal water relaunch.