That's about what you need. You're using 5 to 1 scope, which many would
consider the minimum for security. 3 to 1 is the absolute minimum for most
anchors to hold at all; most texts say 7 to 1 or 10 to 1 is better for heavy
weather.

Using more chain reduces the need for a lot scope, but you also need some nylon
line as a shock absorber, so even if you go to all chain, you need a nylon
"snubber."

FWIW, I use 50 feet of chain, and always let that all out, plus a fair amount of
nylon. I almost always have at least 100 feet of rode out. While that seems
like a lot, its only 3 boat lengths. Think of how much larger it would be if
the anchor dragged.


"Peter Scott" wrote in message
. ..
I have an anchor and chain and line.
Is this how to calculate the length of the line
Chart reads 5' add 3' to the deck add local tide data 9.7' total of 17.7
multiply by 5 gives 88'. This seems like a lot and will make a very large
circle if the wind changes.
Thanks Peter