3 to 1 scope is on the marginal side. I've done it many times for lunch
anchoring where someone is always in the cockpit, but overnight I would
never use less than 5:1, usually I use 7:1.

In theory, with all chain you can get by with less, especially in deeper
water, but on small boats with no anchor watch, you want to be 100% secure,
95% just doesn't do it!

So what reason would you have to skimp? If the anchorage is tight, use two
anchors. If its too crowded for 5:1, go elsewhere. If you don't like
hauling the extra chain, buy an electric windlass. I shortened my chain
from 100 feet to 50 when I realized that my anchoring decisions were being
affected by a desire to avoid hauling a lot of chain. Nowadays I haul and
reset maybe half the time I anchor, making sure we're well and truly set
exactly where I want to be; with more chain I wouldn't be doing that.

BTW, if the mud is soft, a plow might not hold that well in a blow. I use a
Delta as the primary, but keep a Fortress on the bow to add in soft stuff.

One more thing, anyone who uses the word "catenary" doesn't really
understand anchoring.



"cvj" wrote in message
. ..
I am getting different advice on the recommended scope when anchoring.
Chapmans says 6-7 times the depth, whereas my Danish friend (Very
experienced sailor) says 3 times depth is sufficient, especially since I
have a heavy anchor and all-chain rode.

In the following hypothetical situation, what scope would the group
recommend:

38 foot sailboat
35 lbs anchor (Plow type)
all-chain galvanized steel rode (300')
mud bottom
sheltered anchorage - calm day - lots of other boats at anchor
High tide mark at 20 feet above bottom.

Appreciate any feedback!