Release to full flag so nothing is loaded, and rotate the harness hook to your back before you start. Never sort or pull on lines that still have load in them: loaded thin line is what cuts hands.
Work from the bar outward, gathering the centre lines to the point where they split and stopping short of the knots, exactly as in the stash. Chain the slack into loose loops as you go: a loose chain shakes out, a knot does not.
Canopy over the knee, roll toward the trailing edge so the lines finish inside the bundle. Drain the leading edge first if the canopy is holding water; trapped air is the thing that makes a bundle refuse the belt.
Board stays leashed upwind of you the whole time. Pack, breathe, remount, and only then think about powering up again.
This is the failure branch of the sport, and it is the one part of the curriculum where the honest answer is that no standard exists yet. Riders describe blowing a wing out offshore and sorting it in the water, but nobody has published a method, a timing or a drill set for it. What follows is the sequence that follows logically from the stash and from self-rescue and drift, not a protocol anyone has validated for you.
A reliable stash and redeploy on flat water, comfort swimming and floating in the conditions you ride, and the drift arithmetic done before you go out, so you know what is downwind of you while your hands are full.
Everything here serves one goal: get the lines captured inside a bundle that will not shake loose, without putting a loaded line across your hand. Line tension is the hazard, air and water in the canopy are the bulk problem, and the board is your flotation, so it never leaves the leash.
If the wing is tangled but not blown out, you are in swell-tangle recovery territory instead: sort it floating, and only escalate to a full repack when sorting has failed.
Repack on land until your hands know it without your eyes, then in a pool or waist-deep water, then in flat water while floating. Practise the abort decision too: set a rule for yourself about when you stop sorting and start paddling, and rehearse it on a day when it costs nothing.
Safety note: this article is written from the principles above rather than from logged offshore repacks, and it has not yet been checked on the water. Treat it as a starting point, drill it somewhere shallow, and do not make yourself the test case a long way offshore.
There is no published benchmark, and we have not timed one, so treat any number you see as a guess. What matters is that it is slower and clumsier than a flat-water repack, and that you have drilled it on land often enough to do it while tired, cold and floating.
Single-skins shed water and roll tighter. Double-skin designs hold water in the cells, so drain the canopy leading-edge-down before rolling or the pack will not fit the belt.
When the wind is dropping, you are drifting toward a hazard, you are getting cold, or the same tangle has beaten you twice. A stashed or even roughly bundled wing adds almost nothing to a prone paddle, and deciding to paddle early is always cheaper than one more failed attempt.