I am lead to believe (having seen a mooring set up like the one I am on)that the ground tackle consists of a length of large chain lying normally across the prevailent wind/sea direction.sahona wrote:Seemed sensible to me as the boat is afloat and under the command of Mr Archimedes, so weighs nothing.sam wrote:They weren't interested in the weight of my boat but the length as they said that the windage is the most important aspect when sizing a mooring. .Old Troll wrote: I have also pointed out to the Harbour Group that the description of "suitable for yachts up to 12 metres" is not the usual fashion of indicating mooring specifications. Mooring holding being best described in tonnage rather than length.
However the "chug factor" once the mass is on the move is what counts surely. I recognise that windage will add to the motion the mooring is trying to arrest as the boat ranges, and waves don't help.
Once it starts moving it's a bundle of energy, and the heavier it is, the more it takes to stop.
Moorings don't have the catenary we enjoy at anchor in order to cram lots into a small area, so the underwater gear takes a direct pull on each snatch.
This chain has a substantial mushroom anchor at either end and a large guage riser chain taken from mid point of the ground chain.
The riser chain with scope to spare at HAT is fed up through the Hippo bouy to a shackle which the strop is attached.
This set up allows the ground chain some catenary and same for the riser chain.
I would imagine (hope) this is a strong forgiving setup.
C_W