Good lines and ropes on board are essential for any boat. They ensure safe mooring, unmooring, and anchoring, and make the difference between smooth maneuvering and damage to the deck and hull. Each type of line has its own function: from mooring lines to anchor lines and fender lines. Choosing the right material and length will ensure safer and more comfortable boating.
Whether you own a sloop, sailboat, or motor yacht, a complete set of ropes is a standard onboard item. This guide explains which ropes you need, what to consider when choosing the right material, and how to maintain them for a long lifespan.
1. Mooring lines: for safe mooring
Mooring lines are used to securely fasten your boat to the dock or jetty. They absorb shocks from wind, waves, or currents and prevent the boat from shifting. Choose flexible lines that are easy to handle and won't become too stiff in wet weather. For a standard mooring, you'll need at least four mooring lines: two fore and two aft. Browse our selection of mooring lines in various lengths and materials.
2. Guidelines for mooring lines
The correct length and thickness of your mooring lines depends on the size of your boat. A rope that's too thin can cut or break, while one that's too thick can be difficult to handle. Below are the recommended guidelines:
Length per boat length
- Up to 6 meters: 6–8 meters per line
- 6–10 meters: 10–12 meters
- 10–15 meters: 14–16 meters
Rule of thumb: a mooring line should ideally be 1.5 times the length of the boat . This gives you enough leeway for tides and waves.
Thickness of the line
- Up to 6 meters boat length → 10–12 mm
- 6–10 meters → 12–14 mm
- 10–15 meters → 14–16 mm
Choice of materials
- Polyester: strong, UV-resistant and slightly elastic — ideal for permanent moorings.
- Nylon: more stretch, absorbs shocks better in waves or strong winds.
- Polypropylene: floats and is cheap, but less wear-resistant.
Usage tips
- Use a fixed eye loop for quick mooring.
- Place bumpers or protective covers where the line rubs against edges.
- Check regularly for fraying, wear or discoloration.
3. Anchor lines and chains
A reliable anchor line or chain is essential for safe mooring in open water. Nylon or polyester is ideal because of its stretch—it absorbs shock from waves. Combine a short chain with a longer nylon line for optimal grip on the bottom. Preferably use a line with a neat eye or chain splice to prevent loosening. Discover all the options in the anchor line or anchor chain collection.
4. Fender lines and fenders
Fender lines ensure your fenders are securely attached and protect the hull when mooring. Choose flexible lines that are easily adjustable and UV-resistant. Clean them regularly to prevent salt deposits and check for wear and tear. View practical solutions in our collection of fender lines .
5. Tow lines and trailer lines
For emergencies or transport, a tow line is essential. Use a floating polypropylene line to prevent it from tangling with the propeller. Consider the breaking strength and choose a length at least one and a half times the boat's length. For trailering, a shorter, sturdy line is sufficient to secure the boat securely.
6. Maintenance and storage of lines
Check all lines for wear after each sailing season. Rinse them with fresh water to remove salt residue and let them dry completely. Store them loosely rolled up in a dry, ventilated place. During winter storage, you can use desiccant dehumidifiers. use to prevent condensation and mold.
Frequently asked questions about lines and ropes on board
What is the minimum number of mooring lines I need?
For most boats, four mooring lines are sufficient: two at the front and two at the back. In strong winds or when lying sideways, an additional spring line can be useful.
What's better: polyester or nylon rope?
Polyester is durable and ideal for permanent moorings. Nylon is more elastic and absorbs shocks better, making it more suitable for changing conditions or rougher water.
How do I best maintain my lines?
After use, rinse the lines with fresh water, remove any sand or salt, and let them dry thoroughly. Store them in a dark, dry place, and avoid sharp bends or knots during storage.