I'm Sébastien, the designer of this accessory.
Thanks to Regis-de-giens for the explanation and Faxie for the link.
I would like to add the following precisions:
- The main concept is to become safer buy using and handling a line cutting tool for its line manager function.
- For the boat purpose, depending on its size of course but it could be useful to be able to quickly (with only one hand) keep lines position to connect / disconnect the kite.
- For the precise picture you talk about, it's a line guidage function that I develop to help managing the lines on the deck. It was first design regarding some kites with "security position" (safety release activated) on both front lines. Those could be difficult to get back on board but are also going to disappear from the market and the idea was to help making one front line shorter than the other to drift more easily the kite (still possible).
- 2nd video of this section https://kitesurfvoilier.fr/en/on-board-kite/
is a lot lower quality than first one but show how to keep lines extended on the deck in order to be very quick in boat launching. Sorry for quality and also for all the detailed annotation that I made to explain and that Utube make disappear from one day to the next one without any replacement solution
By the way, the product is now upgraded to 2nd version models that don't look the same that the picture and have had some technical improvements.
And one more time, thanks to all users helping me improve on my design project about confort and safety accessories, best winds to all Kiteforum members for 2020!