⛵ Sailing, explained

Races are sailed around inflatable buoys (marks) laid out relative to the wind on race day, most commonly a windward-leeward course: a start line, a beat directly upwind to the windward mark, a run back downwind, and a finish after one or more laps. Because boats cannot sail straight into the wind, the upwind legs are sailed in zig-zags (tacks), and choosing which side of the course to take — chasing stronger gusts or favourable wind shifts — is the core strategic decision of every race. Race committees can shorten, postpone or abandon races when the wind dies, swings, or blows too hard.

The start

The start is a timed sequence of flags and sounds counting down to the gun, with all boats manoeuvring for a front-row position on the line with clear wind. Crossing the line even a fraction early is OCS (On Course Side): the boat must return and restart, or be scored as if it finished behind the whole fleet. If too many boats are over, the race committee signals a general recall and restarts everyone, often under stricter flags — under the U flag or black flag, early starters are disqualified without a second chance.

With no lanes and boats converging at speed, the Racing Rules of Sailing define exactly who must keep clear. The three fundamentals: a boat on port tack (wind coming over its left side) keeps clear of a boat on starboard tack; when boats are on the same tack and overlapped, the windward boat keeps clear of the leeward boat; and a boat overtaking from clear astern keeps clear of the boat ahead. Additional rules govern mark roundings — an inside boat with an overlap at the zone around a mark is entitled to room to round it — and limit aggressive manoeuvres like sudden course changes that give the other boat no chance to respond.

Why you see boats spin in circles

Sailing is largely self-policing. A boat that realises it broke a rule can exonerate itself on the spot by sailing clear of others and taking a two-turns penalty — two complete circles, each including a tack and a gybe. Hitting a mark costs one turn. Taking the turns promptly wipes the slate clean; refusing and being protested risks disqualification after racing.

When boats disagree about an incident on the water, the aggrieved boat hails 'Protest' and may fly a red flag, then files a written protest ashore. A protest committee or international jury holds a hearing, takes evidence from both crews and witnesses, and decides facts under the Racing Rules of Sailing. Penalties range from disqualification from that race to, in serious cases, exclusion from the series. Some classes and events use on-water umpires who signal instant penalties instead, particularly in match racing and medal races.

Olympic sailing is one-design racing: every boat within a class is built and rigged to the same specification, so results come from sailors, not chequebooks. Each class balances different skills — solo dinghies test individual fitness and tactics, skiffs test crew coordination at high speed, boards test athleticism and flight control. Equipment is checked (measured) before and during events, and sail numbers identify each entry.

The Olympic classes

The Paris 2024 programme: ILCA 7 (men's one-person dinghy) and ILCA 6 (women's), 49er (men's skiff) and 49erFX (women's skiff), 470 (mixed two-person dinghy), Nacra 17 (mixed foiling catamaran), iQFOiL windsurfing (men and women), and Formula Kite (men and women). The Nacra 17, iQFOiL and Formula Kite fly on hydrofoils; the rest are conventional (displacement or planing) boats.

Sailors constantly fight the wind's heeling force with their own bodies. In dinghies they hike — leaning far out over the side, feet under straps — and in skiffs and catamarans crews swing on trapeze wires, standing on the gunwale or wings with their whole body outboard. In two-person boats the helm steers and typically calls tactics while the crew trims sails, works the trapeze and manages the spinnaker or gennaker on downwind legs. Boat handling in manoeuvres — tacks, gybes, hoists and drops — is where trained crews win boat lengths for free.

Hydrofoils are underwater wings that generate lift as the boat accelerates, raising the hull clear of the water and slashing drag. Once foiling, boats and boards reach speeds far beyond conventional hulls — often multiples of the true wind speed — because they generate their own apparent wind. The skill shifts from hiking power to flight control: keeping the foil at the right depth and angle, surviving touch-downs, and gybing without crashing. In the Olympic fleet, the Nacra 17 catamaran, iQFOiL windsurfer and Formula Kite are the foiling events; professional circuits like SailGP and the America's Cup race much larger foiling machines.

A championship is a scheduled series of short races — often ten or more — sailed across several days as wind allows. Under the low-point system each finishing place scores its own number of points, the worst race is discarded once enough races are completed, and the running 'net' total ranks the fleet. At the Olympics the top ten after the opening series advance to the medal race, a short, heavily umpired race worth double points that cannot be discarded; final medals are decided by the combined total. This structure rewards relentless consistency: a fleet-race win means little if it sits beside a string of deep finishes.

Racing depends on the wind cooperating. Race committees postpone when there is too little wind, abandon races when the wind dies or shifts unfairly mid-race, and hold fleets ashore when it blows beyond class safety limits. Personal flotation devices are required, support boats patrol the course, and capsizes — routine in skiffs and boards — are part of the sport rather than an emergency, with crews righting their own boats and racing on.