Mooring Servicing

Hello GMac Well my only experience is 21 years on the current swing mooring. The mass has never been lifted in fact I found it on the bottom and attached chain and said this is where it will be. So all servicing is by diving usingf scuba for any serious working. (3 to 4 metres of water) I agree with your point that you can't inspect a chain unless you clean it firstly then carefully part the contact points to look for inspection. I actually like the idea of changing the chain then cleaning it and even refitting old chain after inspection.
(Just to emphasise the difference in weather and location I currently inspect (briefly) my mooring chain at least 3 times per week as it is also our exercise swimming area)
I am sorry if I appeared to advocate galvanised light chain. I definitely don't. Chain for me is always what I can get (cheap) so I am always on the look out for heavy old chain and I keep spare at home.

As for different materials I would agree it is a no no, however about 6 years ago our local water authority brought in licence fees for moorings and to soften the blow they specified and provided big yellow buoys. (something like 5000 of them) The bouy has a stainless rod through the middle and incorporates a swivel. So you attach chain to the bottom and rope to the top. They do seem to give some acceleratioon of wear of the balck iron shackle on the SS ring but it is manageable. Yes the SS rod has been known to fail on a few occasions.

As for using all rope I think it is probably good I just havn't had the courage to go against the usual trend and try it. Certainly in my case chafe where it lies on the bottom would be a problem.
Mooring failures here seldom result isn insurance claims just a loot of inconvenience. regards olewill
 
We use nothing but 20mm rope on the moorings of our 100 boats, and not a single one has gone AWOL in the time I have been a club member. We use rope because it doesnt wear like chain, so most ropes have been in use for 10 years or more.

We moor at the centre of 4 anchors dug into mud / marle. The moorings dry and the tide is fast and high (Bristol channel). Its also fair to say that the water carries a lot of sediment.

I have seen 19mm steel shackles here chafe through in 3 seasons. The bare steel anchors which are burried in the mud and therefore oxygen free seem to last forever.
 
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