Mooring lake des Deux Montagnes Montreal

[francois.lavoie]

I have been working on a mooring last winter and this summer. My sailboat a Catalina 250, 25 feet long, wheighing 3,550 lbs with ballast is tied to it. On the lake extreme winds could blow up to 110 km per hour a few times a year.



I have three helix fixed in clay 5 feet deep, they are said to provide 1500 lbs each of resistance (total 4500 lbs). They are tied by three separate 2 feet chains tied to a longer chain of 18 feet (maximum water level in spring is 12 feet). At the end of the long chain is a swivel attached to the mooring ball. The mooring ball has only one eye under water.



All the elements are 3/8 grade 30 galvanised, and some schakles are stainless steel superior to the chain in working load limit to the chain, in fact closer to the helix anchor points WLL. Two mooring nylon cables to the buoy are attached to the buoy schackle.



The problem is that there is chafe on the two mooring cables, one is almost cut in half.


I know that I should arrange an appropriate pennant. I would go for a total pennant about 12 feet long, made of 6 feet of nylon rope with two thimbles to prevent shafe next to the buoy and two dynema ropes tying the nylon rope to the sailboat.


mooring attachment

https://www.twocsmarine.com/moorings-101/
https://theboatgalley.com/connecting-to-a-mooring-ball/



Is a three strands 7/8 SWL (safe working load) 2200 lbs 6 feet nylon rope with thimbles on boat end (I will spice the rope).
https://www.boatsafe.com/rope-safe-working-load/
https://www.boatus.com/magazine/2017...ble-splice.asp

and Dyneema half final 6 feet (two separate ropes) do the job?

1/2 WWL=34000/10=3400
https://newcontent.westmarine.com/do...ide%202018.pdf


Or is it simply overkill?


Thanks.