Sail Centipede: A Line of Reefing Points Used to Secure the Bunt of a Reefed Sail
Definition:
A sail centipede is an informal term for the line of reefing points—small reinforced eyelets with short cords or ties—that run horizontally across a sail, usually the mainsail. When the sail is reefed and the spare sailcloth is tied up, these cords dangle beneath the boom, resembling the legs of a centipede, hence the nickname.
Understanding the Sail Centipede
When strong winds make a full sail area impractical, sailors reef the sail—reducing its size by lowering it to a set of pre-positioned reefing points. These points form the sail centipede, allowing the loose sailcloth (called the bunt) to be tied neatly along the boom. This helps the reefed sail keep a clean aerodynamic shape, reduces strain on the sail and rigging, and improves control of the boat.
Applications in Sailing
Reefing:
The sail centipede is used during reefing to tie away excess sailcloth. By passing each reefing tie through the eyelets and around the bunt, sailors can secure the sail neatly along its new, smaller shape.
Sail Management:
Properly tied reefing points prevent the bunt from flapping, tearing, or obscuring visibility, especially in gusty conditions.
Safety and Efficiency:
A tidy sail centipede minimises wear on the sail and helps maintain balance and control, which is especially important in small dinghies and cruisers sailing in strong winds.
Examples of Usage
"Before we shake out the reef, make sure to untie the sail centipede."
"The centipede legs were all tangled because someone forgot to tie them evenly."
"After reefing, the sail centipede kept the bunt tidy and stopped it from flogging in the wind."
Visual Representation
Image Description:
Diagram of a mainsail showing a horizontal line of reefing points running between the luff (front edge) and leech (rear edge) of the sail. Short cords hang down from each point, forming a line of dangling “legs” below the boom when the sail is reefed—creating the appearance of a centipede.
Importance in Sailing
The sail centipede plays a crucial role in sail handling and boat safety. By keeping the reefed portion of the sail securely tied, it reduces drag, wear, and risk of damage while maintaining an efficient sail shape. Neglecting the sail centipede can lead to uncontrolled flapping, visibility problems, and even torn sailcloth—making it an essential part of good seamanship.
Related Terms
Reefing Points:
Small reinforced holes with ties used to secure a reefed sail.
Reefing Line:
Rope used to pull down the corners (cringles) of the sail to a new position.
Cringle:
A large reinforced eyelet for attaching reefing lines at the sail’s luff or leech.
Bunt:
The loose portion of the sail that is tied up when reefed.
Reef Knot:
The standard knot used to tie reefing points securely.
Conclusion The sail centipede may sound like a creature from a sailor’s imagination, but it represents an essential part of proper sail handling. Keeping the reefing ties neat and secure ensures that the boat remains balanced, efficient, and safe when the wind rises. A well-tied sail centipede keeps everything shipshape—just as every good sailor should.
