Ray Danet responds: Normally with all-chain anchor rode in nice conditions - without much tide range - a 3:1 is sufficient. In stronger winds and larger tidal range, 5:1 is recommended. In your reference to 7:1, this would be used with a little chain and the bulk of nylon rode. The reason for less scope with all chain is due to the weight of the chain and what is called the cantenary effect. Bob Austin rebutts: I happen to strongly disagree. There are reasons to anchor on 3:1 scope-- after properly setting an anchor, and this often requires even more than 7:1--these would include other boats on short scope in a crowed anchorage and nearby obstructions. I also believe that the cantenary effect in storm conditions is over emphasized. I have been in situations where the chain is 100% off the bottom and perfectly straight. Earl-- You're the resident expert on anchors and anchoring, so do not be afraid to chime in with your comments. We value solid information and informed opinion on the List. What we don't want is people with a vested interest in a product or service shilling for their wares, something you are too classy to do. --Listmeister Georgs