Originally Posted by
scottar
Chain is all about weight in an anchoring set up. It's all about establishing a catenary in the anchor line to absorb any snatching that may be induced by wave action. If you run a light chain like 6 or 8mm short link, you will need more length than if you were to run 10mm (as an example). I have a gpysy winch that takes 6mm short link - thus I run about 20 metres. If it was chain that weighed 3 times as much per metre, I would, to a point, get the same result from 1/3 the length . There are some advantages to running more length of lighter chain - main one being it lifts from the bottom where it's attached to the rope under the weight of the boat in any tide or breeze easier - thus has more chance of getting the connection away from sources of abrasion. It also means that if anchoring overnight in shallow reefy areas, it's possible to basically possible to have either no or minimal rope in the water - thus doing away with any chance of having the rope rub through.