Time to replace my anchor rope.
A question for all the brains trust I have a Santana 28 about 3.5 ton What would be the recommended anchor rope breaking strain required
Any help much appreciated
Minimum would be 12mm Nylon.
Personally, I'd go for 14mm Nylon.
15kg CQR, 10mtrs of 8mm chain then 50mtrs of 14mm nylon.
With that rig, like us, you can sleep soundly.
Safe sailing,
Dusty
Thanks Dusty I have 50m of 12mm Silver that I have just purchased they told me it has a breaking strain of 1.5 ton I was not sure if it suits the boat
YA Regs (section 4.05) would make you have: (min)
9kg plow/CQR or 22S spade anchor
10m x 8mm chain, MBL 2t
Warp 50m x 16mm (PE) or 12mm (nylon)
That would be a reliable minimum for coastal cruising.
Thanks fellers - Thanks Graham, I think I will upgrade to minimum 14mm just to be on the safe side
Hate to be a drift in the middle of the night
Useful background info from the American Boat & Yacht Council's typical horisontal design loads (in pounds) for anchored boats:
30ft yacht in 15kt wind: 175lb
30ft yacht in 30kt wind: 700lb
30ft yacht in 42kt wind: 1400lb
To get force in Kg, multiple pound (lb) by 0.45 or take half the lb value.
So the Working Load (not Breaking load) of rode and shackles should be in excess of the above "typical" loads. Note how the force jumps with increase in wind strength from 15kt to 30kt.
Note also that the figures reflect horisontal forces due to wind, and do not factor in the potential additional vertical forces exerted when the bow pulls on the rode due to wave action. Even so, it's nice to have a ball park idea of the forces on your boat, in relatively flat water, due to wind.
Now, a good question would be: What is the maximum wind speed you should plan for?
Obviously, we all "intend" to be anchored in nothing over 20kt, but then you could always be ambushed.
On the Australian East coast, if you avoid cyclone season, how does a sustained 50kt max inside an anchorage sound (ignoring gusts)? Way too much, ... or not enough?
