How do you safely gybe a sailboat without crash gybing?
I usually tack to change direction because I'm terrified of crash jibing, especially in stronger winds. How do I safely execute a controlled jibe on a 35-foot cruiser without ripping the rigging apart or taking someone's head off?
Answer
A safe gybe requires controlling the mainsail's journey across the boat rather than letting the wind slam it over. By sheeting the main right in before turning the stern through the wind, you eliminate the violent shock-loading that breaks goosenecks and causes head injuries.
Preparing Crew and Cockpit
Gybing carries more force than tacking. The wind pushes the boat forward while the sail flips sides. Before touching the helm, brief your crew. Clear the cockpit of loose lines. Flake the mainsheet tail to run free. Load the new jib sheet onto its winch with three turns. Keep heads below the boom's sweep path and fingers clear of loaded winch drums.
The helm calls "Ready to gybe?" and waits for a clear "Ready" from the mainsheet and headsail trimmers. Check your blind spot behind the headsail to ensure clear water for the turn.
Controlling the Mainsail
Controlling the mainsheet prevents a crash gybe. As the boat sails on a broad reach, the trimmer pulls the mainsail into the centreline. A 35-foot yacht in 15 knots of breeze generates hundreds of kilos of load. Use a winch rather than pulling entirely by hand.
- Sheet the mainsail in until the boom sits just inside the cockpit corner.
- Keep the mainsheet securely cleated or tensioned on the winch.
- Hold your course until the boom is strapped in tight.
Turning Through the Wind
Once the main is sheeted in, the helm calls "Gybe ho" and smoothly steers away from the wind. Turn the stern through the eye of the wind at a steady pace. Avoid a violent spin or a sluggish drift. As the wind crosses the stern, it catches the back of the mainsail and forces it across.
Because the main is sheeted in, the boom only travels a metre or two. It crosses with a firm thud as the mainsheet goes taut. This prevents the catastrophic momentum that tears out traveller tracks or snaps the boom.
Trimming on the New Tack
The moment the boom crosses and fills, the mainsheet trimmer must rapidly ease the sheet. This depowers the boat and prevents it from rounding up into the wind. Let the line run smoothly through your hands or ease it off the winch drum until the sail sets for the new broad reach.