What is Reefing Gear?
Reefing gear encompasses all systems used to reduce sail area in heavy weather. On mainsails, this usually involves reef lines running from the tack and clew of the sail through the boom to reef hooks or slides at the reef positions.
Answered by Marine Keeper — the boat maintenance platform trusted by boat owners and charter operators to track, schedule, and understand every system on the water.
Printing is disabled for this article.
Sign up for Marine Keeper to access our full library offline.
What it is
Reefing gear encompasses all systems used to reduce sail area in heavy weather. On mainsails, this usually involves reef lines running from the tack and clew of the sail through the boom to reef hooks or slides at the reef positions. Headsail reefing is generally managed with roller furling systems. In a slab reefing setup, a single line controls the clew at each reef point, while the tack is secured separately, often using a reefing hook at the gooseneck.
What it does
Reefing systems let you reduce sail area quickly when the wind becomes stronger than comfortable sailing conditions. Proper reefing helps maintain sail shape while keeping the boat balanced and easier to handle. Some systems can be operated entirely from the cockpit. Quick and efficient reefing encourages sailors to reef early, enhancing both safety and comfort.
Why it matters
The ability to reef efficiently and quickly is fundamental to safe sailing. Being over-canvassed in heavy weather is dangerous, uncomfortable and can damage the boat. Reef lines that jam, break or fail to tension properly can cause a vessel to become overpowered, which can be catastrophic in rising wind and seas. Regular maintenance and practice with reefing systems before you need them is essential.
General Maintenance
Inspect reef lines at the start of each season for chafe. Test the entire reefing system under sail several times during the season to ensure it operates smoothly. Make sure the clew reefing lines provide enough purchase for proper tension and mark the lines to make setting the correct tension easier. The replacement frequency for reef lines depends on how often and in what conditions the boat is sailed. Because reef lines experience high loads and chafe, consider replacing them every two to three years. Practice reefing in light conditions so the system is familiar and reliable when needed in heavy weather.
Common Issues
- Reef lines chafing at boom exit points, and near clutches.
- Reef hooks or slides corroding or not securing properly
- Lines routed incorrectly through boom, causing jamming
- Reef points on sail showing excessive wear or stitching failure
- Clew reefing line too light for loads when reefed
- Single-line reefing systems jamming or not distributing load evenly
- Crew unfamiliar with system
- “Finger-trap” style clutches hold lines very securely and can be difficult to release under load. Using them often requires careful coordination between the person at the mast and the one at the winch, making teamwork essential.
- Reef lines too short or too long for proper operation
Try Marine Keeper free
Stop tracking rigging & sails maintenance on napkins.
Marine Keeper tracks every task, expense, and inspection across your fleet. Schedule automatically, get reminded on time, and never wonder when you last serviced something again. Free Personal plan available, no credit card needed.
Related articles
Blocks & Sheaves
Blocks are pulleys used throughout a sailboat's rigging system to redirect lines and provide mechanical advantage. They can be fixed, swi…
Read articleBoom Preventer
A boom preventer is a line or system that prevents the boom from an accidental gybe when sailing downwind. It typically consists of a str…
Read articleBoom Vang
The boom vang is a system used to control the vertical angle of the boom and the twist of the mainsail. It can range from a simple block-…
Read article