Lower the damaged sail to the deck and secure it. Never attempt to repair a sail that is still under load or hoisted — it is dangerous and the repair will not hold.

Lay the sail flat on a clean, dry surface. Identify all tears — there may be more than one. Check the surrounding stitching and fabric for weakness, chafe, or UV degradation.

Wipe the repair area with fresh water and allow it to dry completely. Salt, oil, or moisture will prevent tape from sticking and thread from holding.

Choose the method based on tear size and location (see the tear-type guide below). Small tears: tape. Medium/large: stitched patch. Seam blow-out: re-stitch.

For stitched repairs, cut a Dacron patch at least 5cm larger than the tear on all sides. Round the corners — sharp corners lift and peel under load. For tape repairs, round the tape corners too.

For tape: press firmly from the centre outward, smoothing out air bubbles. For stitched: position the patch and pin or weight it in place. Apply tape to both sides if the back is accessible.

Wax your thread with beeswax to prevent tangling and water ingress. Use a sail palm to push the needle through heavy Dacron. Double the thread for strength on load-bearing repairs.

Sew around the patch with a zigzag stitch (hand-stitched: alternate diagonal pierces). Keep stitches 3–5mm from the edge and 3–5mm apart. Do not stitch in a straight line along a load line — it creates a tear path.

Add extra stitching at corners. If the tear is near a clew, tack, or head, reinforce with an additional layer of Dacron or webbing before stitching.

Trim any loose thread and lightly melt the cut ends with a lighter to prevent fraying. Do not melt near the sail fabric.

Check the repair by gently pulling the sail fabric in all directions. Re-hoist the sail in light wind first before trusting it in heavy conditions. Monitor the repair during the passage.