Knot & Rigging MARITIME TOOLKIT
3D Studio

SAILING & LINES

Anchor Rode

Chain and nylon combined — the chain holds the anchor down, the rope absorbs the snatch.

INSPECT BEFORE LOAD · NEVER EXCEED WLL

Rope, splices and hardware are only as good as their condition. Inspect before every use and retire on evidence.

Anchor Rode — nautical chart line drawing

Specification

CompositionChain leader + nylon rope
Chain size6–12 mm, matched to boat
Rope fibreNylon — shock absorption
Typical scope5:1 working, 7:1+ in weather
EndsSpliced eye to chain, bitter end secured
Common errorToo little scope for conditions

Technical parameters

Boat 8–10 mChain 8 mm, rope 14–16 mm
Boat 10–12 mChain 8–10 mm, rope 16–18 mm
Boat 12–15 mChain 10–12 mm, rope 18–20 mm
Scope settled5:1
Scope in wind7:1 or more
SnubberEssential to protect windlass
SelectLoadInspect

Overview

An anchor rode is the whole assembly between the anchor and the boat: typically a length of chain at the anchor end, shackled to a length of nylon rope. The two parts do different jobs. The chain's weight keeps the pull on the anchor low and horizontal, which is how an anchor actually digs in; the nylon's stretch absorbs the snatch as the boat surges in a seaway.

The amount of rode you set out is called scope, expressed as a ratio of rode length to the distance from bow to seabed. Five to one is a common working figure in settled conditions, seven to one or more in wind or a swell. More scope means a lower angle of pull and more holding power, but more swinging room.

Sizing is governed by the boat, the expected weather and the holding ground. The chain should be heavy enough to lie along the seabed rather than lift, and the nylon should be strong enough for the worst load with a proper safety factor — and generous enough in length to allow the scope you will need.

Safety notes

  • Secure the bitter end to a strong point. An unsecured rode means losing the whole anchor and chain over the side.
  • Fit a snubber between the chain and the boat so shock loads do not reach the windlass and the bow roller.
  • Check the chain-to-rope splice or shackle every time you anchor. It is the single most loaded connection in the system.

Using it well

  • Mark the rode every ten metres so you can set scope by eye without guessing.
  • Let out more scope before you blame the anchor — most dragging is a scope problem, not a holding problem.
  • Set the anchor under power, then take a transit to check it is not moving.

Suited to

AnchoringCruisingStorm prepMooring

Typical applications

AnchoringCruisingStorm prep
Figures are typical catalogue values for new equipment, quoted for comparison and planning. They are not a guarantee for any specific product or any specific load. Always work to the manufacturer’s stated working load limit and to the regulations that apply where you sail.

Related tools

Nylon Rope — nautical chart line drawing

Nylon Rope

High-stretch synthetic with excellent shock absorption — the default for anchor rodes and dock lines.

Rope & Cordage Select
Shackle — nautical chart line drawing

Shackle

The universal metal connector — a bow or Dee shackle with a pin, rated by working load limit.

Rigging Hardware Select
Thimble — nautical chart line drawing

Thimble

A metal liner for a spliced eye that spreads the load and stops chafe cutting the rope.

Rigging Hardware Select
Dock Line — nautical chart line drawing

Dock Line

The line that holds a boat to the shore — nylon, spliced eyes, and sized for the worst surge.

Sailing & Lines Select

∞ CONTINUE

Where this fits

More in Sailing & Lines

Halyards, sheets, dock lines and anchor rodes in service.

5 tools
Free tool

Knot Strength Calculator

Work out what a knot costs you, and what the line can safely hold once it is tied.

Calculator
INTERACTIVE

3D Studio

Four interactive tools for knots, splices and rigging loads, running entirely in your browser.

3D Studio