Contemplate Your Anchor
Hi All,Here is a little article which I wrote for our Legend Owners Association newsletter some time back.The point is that, as far as anchors are concerned, it is the SIZE of the lump of bottom they grab which matters more than just the weight of the metalwork.If in doubt prowl round a marina and check on what everyone else is using.CONTEMPLATE YOUR ANCHORThis is an attempt to understand the magnitude of the forces involved in anchoringOne day, when half a gale is blowing your boat onto the pontoon, stand amidships and try to push her off. Can't do it! In a full gale the force holding her on could be at least four times as great.Now take a long hard look at your anchor. Would you bury it in your flowerbed at home and expect it to hold when pulled by your car. No chance! Farmers use CQR anchors, four at a time, to plough fields - so they must drag.Nevertheless anchors are truly wonderful things. They hold yachts in extreme conditions when buried in sea bottoms of, sand, shingle etc, which must be lighter than the soil in your garden.From time to time yachting magazines publish excellent articles about anchoring techniques. Normally they agree on plenty of weight and plenty of scope but that is about all. Opinions then vary about what is best and this can be confusing. What these articles do not say, and about which there is no disagreement, is what is bad for an anchor's holding.1) There must be no jerking.2) There must be no sawing from side to side.3) There must be no radical change of direction of pull. The latter normally only occurs when the tide changes and the winds are light, but, nonetheless it seems to cause most anchoring problems. Radical change of direction of pull can also occur if the eye of a hurricane passes overhead, Lord help you as you should not have been there in the first place.There is no mystery to anchoring and any means to achieve the above three conditions will suffice. If you can satisfy the rules then you should be reasonably secure.Clearly no anchors will hold properly in unsuitable bottoms such as weed, kelp, soft mud etc, but such places are shown on charts so don't try there.So what should you do? Read the published articles and just follow the rules, lay out your anchor rather than dump it in a heap. Veer rather more scope than you think you need, you can shorten in a little later on if necessary to avoid other moored boats. Drift down wind or tide and when at the end of the scope and the anchor begins to bite, gradually increase the power astern to full throttle and wait until the scenery stops going by. If this cannot be achieved try again or only stay for lunch. If it happens regularly get a bigger anchor. Simple really - or is it?Don Alexander