new chain riser - attachment ?

grafozz

grafozz

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I have to replace my riser chain as it is getting thin , which is suspended under the mooring buoy
the water is 3.5 metres deep and I can swim down but cannot stay down long enough to tighten the shackle onto the block .
Is there a fitting that can be attached fairly quickly or has anyone an idea on how this could be done ?
 
Yes , thanks , Davy S ,
thats how it is now but it its now worn out , so wanted thicker chain this time , if in 12/14mm becomes heavy for the buoy ,
but could do as a last option if no more geniuses turn up !
 
All our club riser chains are now ordered with a ring in the end. The chain is then passed through the ground chain (or sinker in your case?) then reeved through the ring and the free end brought back up to the surface. If you can't get chain with a prewelded ring you could use a well moused (or better still welded) large shackle on the end of the chain instead. Pass the chain through your sinker attachment then reeve it through the shackle and pull tight. You might even be able to do the reeving at the surface. This assumes of course that your chain will pass freely through the staple/ring or whatever else you have on your sinker.
 
Get a ring put on the end of the chain.
Put other end of chain through the sinker, then through the ring and pull tight?
Or shackle a loop of chain to the end of the riser and pass the riser through the loop forming a cow hitch.

But really, this is the excuse you need to learn SCUBA.
 
Is there a cruisers VHF net or similar (eg facebook page) for where you are? I think you will find that a reasonable proportion of yachts have diving gear aboard (we do) and would therefore be happy to help out. I second lw395's suggestion to learn to dive - it's quite rewarding in it's own right and you may very well recover the cost doing boat-related things over the next few years.

I suspect that The PADI school won't do it, at least not officially, since underwater maintenance or operations isn't part of their syllabus (I asked a local one here in Falmouth because I maintain my mooring and hoped to sign up for some training beyond 'open water' diving but they wouldn't construct such a course and cited HSE rules) but doubtless one of the instructors would work on your mooring in a personal capacity; things are probably different in Greece!
 
You don't need the ring welded on, use a shackle instead. Attach shackle, secure, dive, thread chain end through attachment on block, through shackle, pull chain all the way through, so shackle sits on block - etc. If you want to enlarge the end link, to take a bigger shackle, squeeze the end link in a vice to make it more round. If you get a decent shackle, Van Beest, it will outlast the chain as the shackle will be at least a G50 and the chain only a G30 and strength, the G number, is proportional to abrasion resistance.

Jonathan
 
jdc said:
I suspect that The PADI school won't do it, at least not officially, since underwater maintenance or operations isn't part of their syllabus (I asked a local one here in Falmouth because I maintain my mooring and hoped to sign up for some training beyond 'open water' diving but they wouldn't construct such a course and cited HSE rules) but doubtless one of the instructors would work on your mooring in a personal capacity; things are probably different in Greece!
Click to expand...

I went the BSAC route. If you have learned to dive (not just try dive) and have the kit then just get on and do it. Handling hack saw and other simple tools is no different under water, except when they disappear into sediment.
 
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