i have used a length of plastic coated stainless steel wire ,bit like the rigging stuff on sailing boats with a couple of eye pieces crimped at each end ,and then i thread it through the drain trunk in the transom and padlock it to something solid ,ok if you want to moor up and go for a walk too and its a dodgy place ,unless the thieves happen to have bolt cutters ,but it stops it just being lifted by the casual thief.,,as the other posts suggest even if you deflate one side of the boat ,,to them it looks like could have a punture .
__________________
|