Be carefull not to go to big I have twice had problems when hooked up to something that is not 100% solid. Once I hooked some trawler ropes & the last time I hooked up to a piece of a wreck. When i tried to drive off & snap the tie it just kept pulling what I was hooked to & wouldn't break the tie. First time had to drag the trawler rope to the top (in 30 m water) & cut the tie. Last time after stuffing around for ages trying to pull it up, we let it drop back to the bottom & it freed itself.
Better to use smaller ties & if it keeps breaking free add another tie.
Adrian