2 min read · Updated 19 May 2026
Tacking turns the bow of a boat through the wind; gybing turns the stern through the wind. Both manoeuvres change which side the wind blows over and which way the boat is heading, but they happen at opposite ends of the wind — tacking upwind, gybing downwind — and they feel very different to sail. They are the two fundamental turns in sailing, woven through every leg of a race and every one of the points of sail.
Tacking — turning the bow through the wind
A boat tacks when sailing upwind. Because a yacht cannot sail straight into the wind, it works to windward by sailing close-hauled and zig-zagging, turning the bow through the wind from one side to the other. As the bow swings through the no-go zone, the sails briefly luff and lose power, then fill on the new side and the boat accelerates away on the opposite tack.
The skill is in carrying speed through the turn. Tack too slowly or without enough momentum and the boat can stall head-to-wind, "in irons", and have to rebuild speed. Done well, a tack is smooth and loses very little ground.
Gybing — turning the stern through the wind
A boat gybes when sailing downwind, changing course by turning the stern through the wind so the sails swing across to the other side. Unlike a tack, the wind stays in the sails throughout, so the mainsail and boom cross the boat quickly and with real force.
That is why gybing demands more care. An uncontrolled gybe — where the boom slams across unexpectedly — can injure crew and break gear, so crews control the mainsail across the turn. On boats flying a spinnaker or gennaker, the gybe also means swinging the big downwind sail across, a coordinated manoeuvre touched on in spinnaker hoists and drops.
When each is used
The rule of thumb is simple: tack upwind, gybe downwind. A boat beating to a windward mark tacks; a boat running to a leeward mark gybes. Because a yacht is faster reaching than dead downwind, racing crews gybe through a series of fast angles on the run to make the best progress, just as they tack up the beat. Both manoeuvres swap the boat's windward and leeward sides, which is what makes them central to racing tactics. For more terms, see the sailing terms glossary.
Frequently asked questions
- What is the difference between tacking and gybing?
- Tacking turns the bow of the boat through the wind so the sails cross to the other side, and is used when sailing upwind. Gybing turns the stern through the wind so the sails swing across, and is used when sailing downwind. In a tack the bow passes through the no-go zone; in a gybe the wind crosses the back of the boat.
- Why is gybing more dangerous than tacking?
- In a gybe the mainsail and boom swing across the boat fast and with full force, because the wind is behind and stays in the sail throughout the turn. An uncontrolled gybe can injure crew and damage gear. A tack is gentler, because the sails lose power as the bow passes through the wind, so they cross with little force.
- When do you tack and when do you gybe?
- You tack when sailing upwind, zig-zagging towards a windward mark by turning the bow through the wind. You gybe when sailing downwind, changing course by turning the stern through the wind, often to sail the fastest angles down to a leeward mark. Both change which side the wind comes over.
- What is the no-go zone in a tack?
- The no-go zone is the arc straight into the wind where a sail cannot drive the boat. When tacking, the bow swings through this zone, the sails luff and lose power briefly, then fill on the new side. Carrying enough speed into the tack is what lets the boat coast through the no-go zone without stalling.