There's a red steering cord that goes between the front and rear riser, one on the left, another on the right. So it is effectively 4 steering lines. Each pair has one line going up towards the skirt just beside the slot in the front of the canopy, and the one that's at the back. The steering lines don't go all the way up; they just attach part way up into the appropriate suspension lines, as has been done on some American rounds.
Edit: All that is for turning. For movement, one is stuck with good old sideslipping.
Thus one is getting turning power from both of the small slots. (I think the front lines cross over so that the direction of push is appropriate.)
As for the riser attachments, that system is designed for no aerial cutaway. One riser is designed for ground release in case of dragging.
The riser release: There's a velcroed flap with a big stiff tab. Grab the tab to open the flap and keep pulling. That pulls out a big pin (restrained with a bungee) from across the riser. That lets fabric webbing (white in the photo) uncoil from around the metal bar for the riser and the metal bar for the harness. The wrap is I guess a bit like a Strong Wrap.
Thanks SEREJumper for the video. I haven't jumped my D-6 since last year.
(This post was edited by pchapman on Nov 24, 2011, 3:43 PM)