Hi there,
On the East Coast of Canada – we have owned our Nonsuch 26 C #207 for some
sixteen years all on a mooring in roughly the same depth as you appear to be
moored
I assume that the mooring you use is owned by another party ( Harbour
Authority etc.) and therefore you are only responsible for the above water
connections ie. the bridles
What we have used here are twin bridles each approx. 25.feet long made from
POLYSTEEL 5/8 inch this rope has approximately three times the breaking
strength of 3/4 Inch regular poly and is much easier to handle.
We do not use swivels as past experience has shown them to be the weak part
of the mooring set up. For approx. six to eight feet from the attachment
to the mooring chain we lash both bridles together (about three lashings) This
prevents them get caught up/twisting around the mooring chain/ball when you are
out sailing.
Also prior to splicing we fit chaffing material from close to the bridle
eye which is dropped over the cleats to sufficient length to be well clear of
the anchor. We also use the opposite cleat to the”mooring eye” where the bridle
comes on board. This gives a much better lead from the “mooring eye” to the
cleat.
If extreme weather is forecast ( we do occasionally get remnants of
hurricanes) we have a length of 3/8 inch chain which we shackle directly to the
mooring chain (ensuring to mouse this shackle) this is then led thru the
empty bow anchor roller and made fast with a couple of turns around the forward
mooring post and then shackled to itself. The length of this chain is slightly
longer that of the polysteel bridles.
Should the bridles give way then the chain certainly will hold as long as
the mooring chain.
As far as swing goes when the weather really picks up our “Single Malt”
does not swing much more than other yachts around
Hope this will help you sleep better !!!!
Best Regards
Cedric