South Wales Marine Berthing Alongside Rope Size Guide

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Online catalogue > Buying Guides and Other Information > Berthing Guides > Berthing Alongside Rope Size Guide

3. Berthing Alongside Rope Size Guide

The following table gives a guide to the size of rope recommended for your Berthing Lines. Primarily you should use Nylon berthing lines due to their superior elastic properties which are ideal for absorbing shock loading as the vessel surges forward and aft. Some people use Polyester for their mooring lines because they have slightly better abrasive resistant qualities, but are a less elastic.

You should never use polyprop. for mooring lines because they degrade very rapidly with UV light, and can then part very easily. Also you should never use old halyards as mooring line, because the nature of their initial job as halyards was to stretch as little as possible, so, if old halyards are then used as mooring lines, there is a very good chance of shock loading deck cleats / fittings as the vessel surges at it's berth.

BERTHING ALONGSIDE ROPE SIZE GUIDE
Boat length	Dayboat	6m	8m	10m	12m	14m	16m	18m
Nylon Berthing Lines	6-8mm	8-10mm	10-12mm	12-14mm	14-16mm	16-18mm	18-20mm	20mm
Polyester Berthing Lines	8-10mm	10-12mm	12-14mm	14-16mm	16-18mm	18-20mm	20-22mm	24mm

Online catalogue > Buying Guides and Other Information > Berthing Guides > Berthing Alongside Rope Size Guide

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