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lordleaz
lordleaz

Posted: Sun Apr 14, 2019 5:36pm

Post Subject: Anchor

Bit confused about anchor's do I need one on any of the rivers if so what sort would I need for a 50ft narrow boat do I go for weight/size/type regards Keith.

Tony-B
Tony-B

Posted: Mon Apr 15, 2019 6:48am

Post Subject: Anchor

I can't be much help here because I am an engineer not a seagoing specialist and if I made any recommendations and something went wrong I could be in very serious trouble. The first thing I will advise is that you Google your question and you will find lots of very good advice but it will be on sea going sites, not narrowboat ones. To help you we normally take an complete unweighed narrowboat to weigh about a ton per meter so take your boat as weighing about 15 tons. Next you will have to decide what sort of bottom you will be anchoring in. That is all very well for sea boats because their charts will give them a good idea and they may carry more than one anchor type. River beds range through the whole spectrum from rock, gravel to mud. Then you need to know the depth of water you are anchoring in so you put out the enough anchor chain and rode (line). As the majority of river authorities only give maximum draft depths this is again an unknown for many rivers. Finally you need to work out how to stow whatever style of anchor you decide upon. Now you hit the first problem for narrowboaters. There is every chance the anchor and chain you decide upon is too heavy for you to easily pull back onto a narrowboat. Cruisers often have an anchor winches so it is not such a problem. Unless you are willing to consider the anchor a consumable and cut it free if you can't recover it there is little point in having one you cant lift but remember it will be slightly lighter while in the water but not as you try to lift it over the gunwale. Just to complicate things you also need to consider which end of the boat you will deploy from. When travelling down stream there is little point deploying form the bow if a 50ft boat if the river is not very wide. If you did you would get jammed between the sides of the navigation channel as the boat swung on the anchor. On a narrowboat an anchor is really only a last ditch device in case an engine fails above a weir, especially if the river is in flood or you are drifting onto a bridge pier so some may deviate from the apparent best solution and choose something easy to stow and light enough to recover. In many cases the anchor may act as an expensive mud weight. Before I tell you what I have I will advise that when you have the anchor you practice deploying it because you let it out gradually. If you just throw it, its chain and road out in a big heap the chain will lay on the anchor and stop it working. Now I know my anchor equipment is sub optimal so I ensured I could deploy the anchor with just enough chain so it drags along the river bed. That slows the boat enough so the rudder can be used to angle the boat across the current so the current forces it to drift down stream and sideways so you eventually hit the bank. This is NOT A RECOMMENDATION:- I have a 20 to 25 Kg Danforth anchor because it stows flat and upright and is ready for instant deployment , this is despite it not being the best type on all grounds in tests. I then have many meters of anchor chain (not some stuff from B&Q etc.) plus many meters of rope. The chandler I bought it from advised on chain type and lengths. Finally ensure the bitter end of the rope is attached to a really strong fixing point on the boat. T studs and dollys have been known to pop off when under strain. I can't help with chain and rope length simply because we do not know the rivers you are referring to and even if we did we can not be sure of the depth but basically the longer the better as long as you deploy it properly.

lordleaz
lordleaz

Posted: Mon Apr 15, 2019 10:37am

Post Subject: Anchor

Thanks for the informative reply Tony very helpful

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