Your only option may be a drift launch. There are some youtube videos on that, but I haven't found one that I would say is the "safest' method...The safest method I recommend is sort of mix between the two methods shown in these two videos:
video 1:
video 2:
In video 1, the risk he's taking is obvious. He's letting the kite go free whilst the lines are still wrapped up around the bar. Not to mention he's using a board leash for his surfboard ??!!. So if the kite turns around and powers up while the lines are still wrapped around the bar, you'll find yourself in a death loop in no time and probably have to release the whole kite! This is super unsafe!
In video 2, it's a bit of a safer method, but...you run the risk of tangling your lines with the crap on the beach...seaweed in the shallow water, etc. which could also result in the kite going out of of control but at least you can probably successfully activate the safety system and recover from it without having to release the whole kite.
So...the method I recommend is to setup the kite on the beach with the lines upwind, attach yourself to the bar (leash + chicken loop) wrap the lines around the bar and secure with the elastics. Grab the kite and be careful not to wrap the bar inside the bridles as this will tangle your lines. Bring the kite down to the water in the secure position and hold it at the same time as you hold the bar. Unwind the lines from the bar and let the lines drift downwind (you're still holding the kite at this time). Once all the lines removed from the bar ends and the bar is clean, let go of the kite and let it drift downwind, lines come in tension, untwist the bar if necessary, do a pre-flight check of your lines, and water-relaunch as usual. If the lines don't look good, you'll have to self-land after pulling your safety system and start over again.
Takes time and practice, but with the right approach is very safe.
