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Marlow Blue Ocean® Doublebraid Control Lines

Marlow Blue Ocean® Doublebraid is the latest addition to their eco-friendly, sustainable Blue Ocean® product range.

The Blue Ocean® range is manufactured from 100% recycled rPET polyester sourced entirely from waste plastic bottles, so by choosing this eco-conscious option, you are making a small contribution towards turning the tide on plastic Clean Seas - www.cleanseas.org

Please note the current advisory from Marlow:

Due to current global supply and material consistency issues with some rPET raw material, Marlow have unfortunately had to take the decision to substitute the coloured yarns for regular polyester yarn meaning that the rPET yarn in this product now accounts for 75% of the product instead of 100%

Blue Ocean® Doublebraid Facts, Features and Plus Factors:

Suitable for all running rigging applications on cruising yachts for eco-conscious skippers and owners, Blue Ocean Doublebraid can be used for e.g. halyards, sheets, guys, reefing lines, tack lines, vangs/kickers, down/outhauls, furling lines, runner tails, preventers.

Blue Ocean Doublebraid is a versatile control line, but the bonus is that it has much less impact on our planet than other polyester ropes.

Core: 16 strand, braided high tenacity Blue Ocean® trademarked yarn
Cover: 24 plait braided high tenacity Blue Ocean® trademarked yarn

  • Sustainable
  • Flexible and comfortable to handle 
  • Spliceable
  • Good tensile strength
  • Excellent general purpose line
  • Good UV resistance
  • Good abrasion resistance
  • Low stretch
  • Sinks
  • Available in 5 attractive marble effect blended colours: Blue, Black, Green, Grey, Red
Diameter 6mm 8mm 10mm 12mm 14mm
Weight per 100m 2.84kg 4.8kg 7.47kg 11.1kg 15.6kg
MBL 1280kg 2360kg 3390kg 4380kg 5570kg

MBL = Marlow Minimum Break Load

Jimmy Green Doublebraid Running Rigging Size Guide

The Jimmy Green Rigging Team have produced this line diameter chart from Marlow's own recommendations to assist you in specifying your Doublebraid for a halyard, sheet or control line. Use a combination of your yacht length and the appropriate sail area to interpret the table and determine the closest match to your requirement.

Marlowbraid Sheets or Control Lines:
Yacht Length Overall 6-8 metres 9 metres 10 metres 11 metres 12 metres 14 metres 16 metres 18 metres
Approximate Sail Area in square metres
Main 8.5 13.5 16 18.5 23.5 37.5 50 67
Genoa/Jib 9 16.5 25 33.5 42 58.5 71 83.5
Spinnaker 37.5 46 54.5 71 92 117 150.5 184
Marlow Recommended Sheet or Control Line Diameter
Main 8mm 10mm 10mm 10mm 12mm 12mm 14mm 16mm
Genoa/Jib 8mm 10mm 10mm 12mm 12mm 14mm 16mm 18mm
Spinnaker 8mm 8mm 8mm 10mm 10mm 12mm 14mm 16mm
Spinnaker Guy 8mm 8mm 10mm 10mm 12mm 14mm 16mm 18mm

Marlow generally recommend reducing the line diameter by one size if you are considering a halyard with a dyneema core

The Jimmy Green running rigging line diameter chart is derived from the data in the Marlow Definitive Rope Guide: Marlow Line Diameter Selection Guide - PDF

Marlow Rope Care Advisory - PDF

Read More

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