Phoenix_V

You need to look at where the negligance (if any lies) The speeding boat may be to blame but probably cant be found and would probably say that it was just doing a normal speed. The marina has done nothing wrong. The owner of the other boat has done nothing wrong. You could argue that the crane co were his employees and therefore his agents so he is vicariously liable for their actions but he would only counterclaim against them so that would waste everyone's time unless the crane company had disapeared in the meantime. The crane company implicitally (As Bojo would say) accept that they mis moored the other boat and there is your negligance and claim. Now there might be all sorts of contractual arrangements betwee marina/crane people/other boat owner but (in theory at least) that is for them and not you to sort. If this is the marina I think it is best to just let it rest.

They do look rather similar and £300 difference in price! I think gasoline is just a mistranslation. Whichever one is bought a marine exhaust is needed! (which will be extra)

These look interesting https://www.randdmarineelectronics.co.uk/store/AUTOTERM-Flow-5kW-Diesel-Water-Heater-p127673732 or https://marineheating.co.uk/autoterm-planar-heaters