@Macster: Yes and no:
Yes Patience can be important, but short lines just make Drops more likely but are just helpful to wind up to get to the kite to put it into a good starting Position which should not be necessary in 99% of the relaunches.
If you drop your foil kite, while riding a foil board:
1. Don't care for the foil kite, highest priority with a foil board is ALWAYS to get the foil board, even if you have to release line tension to get it and make things worse for the kite.
2. Sit on your board and actively paddle to a position exactly windwards of your kite, keeping line tension as early as posible
3. By line tension, try to bring as much canopy into the air flow, for first no matter if it is ready to relaunch or upsite down. The more canopy catches air the more canopy can help to lift the kite and prevent further water to enter.
4. Always keep control of your wind window position, if the kite starts to drift to one site you may have to drift yourself in the same direction, doing this you keep the tips open or help to open them.
5. Make your self experience of how to untangle the kite:
There are 101 ways to untangle a foil kite even without swimming to the kite and even if you have a 360 twist in the middle, in the tipps or what ever. You may pull the kite long on one line, you may work with both front lines, etc. In some situation you have to prevent the kite to Invert within its bridle, in others Inversion can be the solution to turn the kite (20 years ago this was the only solution to turn 2 liner foils around …) The key is experience, knowing the right movement in the right secound, you have to permanently react on the situation which can change fast....
6. If kite is turned on the right side and tips are free and open but still a lot of water inside, help the kite to release the water, and don't worry, as long there are 6-7 knts of wind you may have even a half a ton of water inside with one or both tips half a meter under water, a soft kite will be able to release the water, but normal start position will be the only sensefull way to do it, while rescue with a boat will just cause damages to the sewings and more entering water in the future.
7. Pull in the trimmer by about 30-60 cm and wait, you may do a bit of a pumping movement, but maybe instead of doing it wrong it can be better to just don't pump.
8. Moment of patience
9. First you have to get the middle of the trailing edge out and free of water, if you reached this, you already made it and the rest is just about time.
10. Most important on the end: never start to early, especially if one tip is free first. If you see one tip tends to start, release trimmer tension imediately and use stearing line to keep it backstalled on the ground, now you can tension the trimmer again: So on the end one hand on the trimmer to help the heavier tip to release and one hand oversheeting the stearing line of the lighter tip.
11. Even if most of the water is out and both tips are able to start, better keep kite on the ground till ALL water is out, otherwise the flapping of the water filled starting tips will stress the canopy and sewings and can easily cause a asymetrical colapse of the kite and the next drop.
And yes, you also can fly one tip up and put the kite on the other heavy tip, but better don't try this, if you are not 100% sure you are able to do it, reaction time here to stabilize the flying tip and knowing the right wind window position is difficult. Doing it with my description is the much safer and the 99% sucessful way.