Sailing
Racing rules and equipment requirements: right of way, starts, marks, scoring, hulls, rigs, sails and inspection.
Rules
Fleet racing and the rulebooks
Sailing races test how efficiently crews use wind and water to complete a prescribed course. In ordinary fleet racing, boats compete together, starting, passing marks in order and finishing correctly. The Racing Rules of Sailing work alongside class rules, the notice of race and sailing instructions; reading only a general summary is not enough.
Scoring and winning a series
The standard low-point system awards 1 point for first place, 2 for second and so on. The lowest series total wins. Under the default series calculation, the worst race score is excluded, but the notice of race or sailing instructions may specify a different number of exclusions or none at all.
The starting sequence
The standard starting sequence gives a warning at 5 minutes, a preparatory signal at 4, removes the preparatory flag at 1 and starts the race at 0. Times come from the visual signals; a missing sound does not change them. The event documents can state a different warning interval or permitted starting procedure.
Early starts and recall flags
An individual recall uses flag X when boats are over early or must correct an applicable starting infringement. A general recall restarts the fleet when identification or the procedure has failed. Returning is not always enough: the preparatory flag determines whether extra starting restrictions or disqualification apply to an identified boat.
Port and starboard tack
When boats are on opposite tacks, the port-tack boat must keep clear of the starboard-tack boat. Tack is determined by the windward side, not by the direction the boat appears to travel on a chart. Keeping clear means the right-of-way boat can continue without having to take avoiding action.
Windward, leeward and clear astern
On the same tack, an overlapped windward boat must keep clear of the leeward boat. If the boats are not overlapped, the boat clear astern must keep clear of the boat clear ahead. Overlap is assessed using hulls and equipment in normal position, with the definition also covering an intervening overlapping boat.
Tacking and keeping clear
After passing head to wind, a boat must keep clear of other boats until she reaches a close-hauled course. During that interval the ordinary opposite-tack, windward-leeward and clear-astern rules do not apply to her. Finishing a tack therefore means more than simply getting the sail onto the other side.
Avoiding contact and changing course
Every boat must avoid contact when reasonably possible, including causing contact between other boats or between a boat and an object to be avoided. A right-of-way boat may initially wait until it is clear that the other is not keeping clear or giving required room, but cannot then ignore a preventable collision.
Mark-room and the zone
The zone extends 3 hull lengths around a mark, measured using the nearer boat. Where the mark-room rule applies, the overlap situation when the first boat reaches the zone normally determines who must give room. An outside overlapped boat gives the inside boat room to approach as appropriate, round or pass, and leave the mark astern.
Obstructions and room to tack
At an obstruction, the outside of overlapped boats generally gives the inside boat room to pass between it and the obstruction, unless unable to do so since the overlap began. A right-of-way boat can choose which side to pass, while still respecting the duty to give room when changing course.
Sailing the course and finishing
Boats must start, leave every required mark on the correct side and in the correct order, pass through gates from the previous mark’s direction and finish. The course is tested by imagining the track as a taut string. A course error may be corrected before finishing; merely passing near a missed mark is insufficient.
Propulsion: wind, water and exceptions
The basic rule is to use wind and water to change or maintain speed. Crew may trim sails and the hull and perform seamanship, but may not otherwise move their bodies to propel the boat. Repeated pumping, rocking, ooching, prohibited sculling and repeated tacks unrelated to wind or tactics are restricted.
Turns penalties and retiring
The ordinary on-water remedy for an incident involving right-of-way rules is a 2-turn penalty; touching a mark can be remedied with a 1-turn penalty. First get well clear, then promptly turn in the same direction, each turn including a tack and a gybe. An event may prescribe another penalty system.
Protests and hearings
A boat intending to protest must inform the other boat at the first reasonable opportunity. For an incident seen in the racing area, this normally includes hailing “Protest” and displaying a conspicuous red flag, with defined exceptions including the flag exemption for smaller boats. The written protest must identify the parties and incident.
Safety, flotation and helping others
Boats and competitors must give all possible help to people or vessels in danger. Each boat is responsible for deciding whether to race or continue, and must carry adequate lifesaving equipment unless class provisions say otherwise. Each competitor is personally responsible for wearing flotation suitable for the conditions; a wetsuit is not a flotation device.
Outside help, fairness and the environment
Outside assistance is generally prohibited during racing, but exceptions cover danger or injury, help to separate after a collision, information freely available to all boats and unsolicited information from a disinterested source. A private tactical instruction from a coach is not made acceptable merely because it arrives by radio or phone.
Class rules and equipment certificates
The Equipment Rules of Sailing provide shared terminology and control methods; they do not prescribe a universal hull size, sail area or minimum boat weight. Those limits normally come from the applicable class or rating rules. Closed class rules permit only what they specifically allow; open class rules permit what they do not prohibit.
Measurement and event inspection
Fundamental measurement establishes equipment’s physical properties; certification control determines compliance for certification. Event equipment inspection is a separate check organised by the technical committee and may include measurement. Inspectors work with the relevant definitions, measurement points and conditions, rather than accepting an approximate measurement taken casually beside the launching ramp.
Hull dimensions and boat weight
Hull length and overall boat length are different defined measurements. Hull length excludes fittings, while boat length uses the boat’s foremost and aftermost points with spars appropriately set and sails excluded. Beam, draft and hull weight also have specified meanings. A number from a sales brochure may therefore not match the measurement used by the class.
Keels, centreboards, rudders and foils
Hull appendages are equipment attached below the defined hull boundary that affect stability, leeway, steering or related functions. A centreboard retracts by rotating, while a daggerboard retracts without rotating. A rudder primarily steers; a hydrofoil can reduce leeway or produce vertical lift. These distinctions help identify the correct class restriction and measurement.
Masts, booms and rigging
The rig includes spars, spreaders, rigging, fittings and relevant corrector weights. Standing rigging mainly supports spars; running rigging mainly adjusts spars, sails or appendages. A mast measurement uses specified reference points, so mast length, sail-setting limits and rigging attachment heights are not interchangeable descriptions of the same dimension.
Sail types and measuring sails
The equipment rules define sails by their construction, attachment and measured geometry, not just their commercial names. Headsails include familiar jib and genoa designs, while spinnakers can be symmetric or asymmetric. Luff, leech, foot and corner measurement points provide a consistent basis for class limits and equipment certification.
Limit marks and setting equipment
Limit marks are permanent, clearly visible contrasting marks identifying measurement points. When applicable, they control how high a mainsail is set, the boom’s position and how far a sail or bowsprit extends. An event limitation mark has a different purpose: it identifies equipment whose replacement is controlled during that competition.
Repairs, alterations and equipment aboard
Maintenance preserves the original condition against wear, repair restores it after unintended damage, and modification changes that original condition. These are distinct equipment-rule terms. Work described casually as a repair may actually alter shape and require different permission under the class rules. Always check certification and event restrictions before replacing or changing equipment.
Based on the supplied official rulebook. References use PDF page numbers; topic numbers are editorial.