Those ratchet waist belts look well sketchy. Ive had ratchets lock in place before!! Also, since people will probably take this on the sea it may be prone to rust.
On top of that I didnt see any backup in case the ratchet locked/jammed. Ive used waist belts before from Kolaski (I think) that have a plastic locking system that releases easily and have a backup velcro release. Might be an idea instead of ratchets.