Mooring lines - nylon, multifilament, poly etc..

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Don't use Polypropylene - it suffers badly from UV degradation and is also has considerably less breaking load than Nylon or Polyester. Nylon is usually recommended as it is 'stretchy'. Polythene is very hard, usually orange in colour, again not very strong. Double braid is usually polyester and is also stretchy. Look at the Marlow booklet to see the various materials used and breaking strain.
Just looked at the Marlow Ropes website and it's rubbish - not a lot seems to work on it, like the Technical Page.......

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Just to correct a bit ... Polyprop is a good mooring line as it is cheaper, can be had in various forms and not being so soft as nylon takes abrasion better. It also gives better indication when it's past it's sell-by-date by having powdery / flaky filaments apparent. Nylon doesn't.

It's actually the preferred mooring line material for ships all over the world.

But don't use DIY shop blue staple line - that is rubbish and I despair when I see odd boats use it. Fine for "grab-it, temp" lines but naff all use for serious work.

As to which is best ? Nylon will give elasticity but take care to make sure you have good size and not skimp. If you ever saw a nylon line break - you will know exactly why I say that. It can do serious damage with that release of stretch. It can kill.

Sorry to be dramatic - but even my small boat of 25ft in Yarmouthy IoW in a storm inside the breakwater broke a 12mm braid mooring line. Luckily no-one was on deck - we were in bed and it was like a cannon going off. Rail and deck were marked where it recoiled. Potoon had a gouge across it.

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Application: Mooring, Anchoring, Fenderline

Excellent UV and abrasion resistance, can withstand the most severe conditions. Easy to splice, retains softness during entire life span.

Good choice for anchoring and mooring, nice classic and traditional look.

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