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cbulota said..
Some good input in this thread already.
Dual front line safety systems are almost out of the market now, however, a few brands still make them (F-One, Zian and perhaps a few others). Simply put, dual front line will flag your kite most of the time but not all the time. In general, the further the bar slides out and the stronger the wind, the more likely dual front line safety will work (provided there are no tangles around your kite/bar/lines).
It's important to understand the difference in terminology between Depower and Flagging (spartacus). Depower means you simply reduce the angle of attack of the kite (bar out or trim in) and that the kite can still be flown or power up at any time. Flagging means the kite has no chance to power up and that the kite's canopy is not exposed to the wind
I did lots of testing on safety systems and tried to recreate a few common scenarios such as a bridle tangle/kite inversion. The results were pretty clear, dual front line safety won't flag the kite if one of your bridles is wrapped around the wing tip, not only that but it will most likely send your kite in a death loop. On the other hand, single front line and fifth line safety still work, even when either bridle is wrapped around the wing tip.
Even though professionally modifying your dual front line to a single front line safety would be the best option, There is a very simple workaround for dual front line safety systems in the scenario described by the OP: Once you have released the QR and the kite isn't flagging, simply walk a few quick steps FORWARD (towards the kite). to allow your back lines to get some slack. This will roll your kite and allow it to flag, get the tension back on the safety line and proceed to recover your kite, self-rescue, whatever.
Of course in deep water that's more problematic as swimming towards the kite in high winds won't really work so well.
As jackforbes said, don't be afraid to release your kite completely at the early signs of safety systems failure, this reflex could save your life. SOOOO many people hang on and don't want to release the kite when this happens.... It's simply not worth hanging on to a death looping kite, let it go!
If it can encourage anyone to release their kite completely in such scenarios, I can tell you that I've never seen or heard of any kite that got damaged after a full release, and I've seen lots. When on land, a full release will make your kite tumble a few times and then secures itself, it typically doesn't go very far either.
Christian
You always offer great advice.....seriously. I try and enforce this concept about releasing the kite before it's too late while people try desperately to save their kite. My advice is always the same. Kites are cheap compared to the loss of life or serious injury. All kites can be repaired easily. It's only a kite