thanks for the link...
this was pulled from that same website of Horst
How To: Launch Peak4 in the water
I do not recommend to fix the bar to the board and then swim to the kite to correct the canopy. I have made a lot of experience with this maneuver 15 years ago, but in comparison to sitting on a floaty foil board and winding up lines, to swim around free floating half sunk bridle lines can be extremly dangerous to tangle here with your legs and to be drowned, please don’t try and also don’t even mention this risky and also ineffectiv method. Just learn to sit stable on your floating foil board and to wind up and off lines and the rest will get easy without to much risk.
As already said, if you drop yourself and the PEAK4 the most important
first reaction is to pull in the bar and keep it pulled in all the time
keep all line tension and bring the kite as fast into a downwind postion, by swimming around it
if there is just 10-30% of the kite out of the water, most time then it will be possible to relaunch
For relaunch itself it is important not only with the Peak4 to first bring as much canopy into the wind as possible, mostly pulling in both back lines.
The most typical error done here is to sheet in to fast and to wide till the canopy collapses due to this. It is important to find slowly the point of maximum back line tension and maximum upwarts pull for the kite but not having the canopy collapsing.
If you made it till here but the PEAK4 often will not start due to water inside the leading edge, try to make some carefull movements to pull the lighter half of the kite upwards and to slowly turn it around in place. This can need some caution and 1-2 minutes but if you trying to fast oversheet to much it will be more likely to have the canopy collapsing and to bring it into a not relaunchable position, means:
go back to step 4