Rowing (World Rowing) — Official Rules

Rowing is the propulsion of a boat, with or without a coxswain, by the muscular force of one or more rowers using oars as simple levers of the second order, while sitting with their backs to the direction of movement of the boat. Rowing on a machine or in a tank that simulates the action of rowing in a boat is also considered rowing. A regatta is a competition consisting of one or more events, each divided if necessary into a number of races, in one or more classes of boats. The sport is governed worldwide by World Rowing (formerly FISA). (Rule 1)

A crew has finished the race when the bow of its boat reaches the finish line. Crews are ranked in the order in which the bows of their boats cross the finish line. A race remains valid even if the crew is incomplete; however a coxed boat finishing without its coxswain shall be excluded. The official result is determined by the Senior Judge at the Finish, taking into account any decision of the Umpire that the race was not in order. (Rule 74)

Racing is conducted by a Jury whose roles include the Control Commission (checking boats, weights and equipment), the Starter and the Judge at the Start (the Judge at the Start alone decides if boats are correctly aligned and if a false start occurred), the Umpire (who follows the race and alone decides on interference), and the Judges at the Finish (who determine the order of finish). A new 2026 provision states that Jury members at a World Rowing event shall not also represent a member federation or team at that event, to avoid any conflict of interest. (Rules 82-85; Appendix R5)

World Rowing recognises nine boat classes: Single sculls (1x), Double sculls (2x), Pair (2-), Coxed Pair (2+), Quadruple sculls (4x), Coxed Quadruple sculls (4x+), Four (4-), Coxed Four (4+) and Eight (8+). In sculling events each rower uses two oars (sculls); in sweep events each rower uses one oar. The "+" denotes a boat with a coxswain and the "-" a boat without. (Rule 25)

Events are divided by sex (Men's, Women's, and Mixed events), by age category - Under 19 (Junior), Under 23, Senior and Masters - and by weight (Open / heavyweight and Lightweight). World Rowing Championship regattas include 1x, 2x, 2-, 4x, 4- and 8+ for Senior, U23 and U19 Men and Women, with lightweight 1x and 2x, a Senior Mixed 8+, and Para Rowing classes (PR1, PR2, PR3). The Olympic programme is fixed by the IOC in consultation with World Rowing. (Rules 13, 14, 18-20, 26, 27)

Coxswains are members of the crew. The minimum weight of a coxswain wearing the racing uniform is 55.0 kg. To reach that minimum a coxswain may carry a maximum of 15.0 kg of deadweight, placed in the boat as close as possible to their person (no racing equipment counts as deadweight). The sex of the coxswain is open. Coxswains are weighed in racing uniform on tested scales not less than 1 hour and not more than 2 hours before their first race each day. (Rule 22)

Lightweight crews must satisfy strict weight limits: a lightweight men's crew must have an average weight not exceeding 70.0 kg (excluding the coxswain) with no individual rower over 72.5 kg; a lightweight men's single sculler may not exceed 72.5 kg. A lightweight women's crew must average no more than 57.0 kg with no individual over 59.0 kg; a lightweight women's single sculler may not exceed 59.0 kg. Rowers are weighed 1-2 hours before their first race each day, as a crew. A rower or crew failing to make weight is excluded from the event. (Rule 23)

The standard international course shall provide fair and equal racing conditions for six crews racing in separate, straight, parallel lanes that are perpendicular to the Start and Finish lines, over a distance of 2,000 metres. For World Rowing Championship, World Rowing Cup, Olympic and Paralympic regattas the course must meet Category A technical standards and the specifications of the World Rowing Manual, including a minimum water depth and lanes marked by buoys. The course must be surveyed and certified by an independent surveyor. (Rule 32; Appendix R4)

The standard international racing distance is 2,000 metres straight for Senior, Under 23, Under 19 and Para Rowing men's and women's events. For Masters (men, women and mixed) the racing distance is 1,000 metres straight. Championship courses must use moveable starting installations so the bows of all boat classes can be aligned on the same start line. Non-standard courses may be shorter (sprints) or longer (head races) and need not be straight. (Rule 33)

On standard international courses races are normally held using up to six lanes. At World Rowing Championship and World Rowing Cup regattas races use up to six lanes but the course must, in principle, have at least eight lanes usable for racing. The first 100 metres of the course constitutes the start zone; a crew may enter it only when permitted by the Starter and after the previous race's crews have left, and must be attached to its starting position at least two minutes before the designated start time. (Rules 34, 67)

Boat and oar construction, design and dimensions are in principle unrestricted, subject to the Bye-Laws; however, except for the rowers' seats, all load-bearing parts must be firmly fixed to the body of the boat. To ensure fairness, boats used at World Rowing, Olympic and other international regattas must meet defined minimum weights (e.g. a single scull 1x at least 14 kg, an eight 8+ at least 96 kg). Boats are weighed by the Control Commission; a boat under weight is marked BUW on the result. (Rules 29, 31; Appendix R3)

Any equipment innovation (boats, oars, related equipment, clothing) must, before use in International Regattas, be commercially available to all rowers, not provide an advantage to some over others or change the nature of the sport, be safe and environmentally sustainable, and a positive development. An innovation must be submitted to the Executive Committee and, if approved, be readily available to all rowers by 1 January of the year it is used. Crews may not compete with unapproved innovations. (Rule 30)

Following 2025 concerns about crews applying substances to the hull, a new 2026 Bye-Law prohibits any substances or structures (including riblets) capable of modifying the natural properties of water or of the boundary layer at the hull/water interface, and any substances capable of leaving residue on the boat or oars (such residue may harm the environment and gives no proven speed benefit). The list of data a rower may see during a race is expanded to include blood oxygenation. The data-transmission rule (no communication to the boat from outside during racing) is unchanged for 2026. (Appendix R2, Bye-Laws to Rule 28-29)

Because crews now carry electronic technology in the boat, a revised 2026 Bye-Law clarifies weighing. Items not essential to the use of the boat and easily removable (logger/box, monitors/displays/athlete screens, extra sensors such as a boat-speed sensor, transmitter box) must be removed before boat weighing. Items firmly fixed and not easily removable (junction boxes, angle sensor, batteries, display brackets) may remain, but a standard weight allowance is subtracted from the measured weight according to a published per-class table (wireless vs. wired systems). (Appendix R3, Bye-Laws to Rule 31)

Entries must be certified by the responsible member federation and submitted by the published deadline. A false declaration - for example as to a rower's identity, eligibility, age or weight - is a serious breach. Entry irregularities and false declarations may lead to refusal of the entry, exclusion or disqualification of the rower or crew from the regatta. (Rules 43-47)

A crew may withdraw before its event. Crew changes are permitted after the entry deadline and before the draw (Rule 49), and thereafter only for medical reasons certified by the medical commission (Rule 50). A reserve weighed in with a lightweight crew may replace a member, but the resulting individual and crew-average weights must still comply with the lightweight limits. A withdrawal, exclusion or disqualification after the draw triggers defined ranking and re-draw procedures (Rule 62). (Rules 48-50, 62)

A random draw, supervised by the President of the Jury, allocates crews to heats and lanes in the first round. Seeding exists only to prevent the faster boats being drawn into the same heat; it affects only the allocation to heats and is not used in later rounds. The Seeding Panel in principle seeds two crews per heat, pairing the highest seed with the lowest, and a supervised random draw decides which heat each seeded pair goes to and their lanes. (Rules 59, 60)

For all rounds after the heats, the principle is to put the crews with the best rankings from the previous round in the middle lanes, the next-ranked in the next outer lanes, and so on; crews advancing by ranking are assigned lanes before crews advancing on time. For 2026, because the progression system now ranks crews on both placing and time (not placing alone), references throughout the Bye-Laws to "placings/finishes" are changed to "rankings", and a defined option places crews with similar previous-round rankings into adjoining lanes. Equal rankings are separated by a supervised draw. (Rule 61; 2026 Bye-Law changes)

When the number of crews exceeds the lanes used for racing, a World Rowing Progression System determines the finalists through rounds - typically heats, then (where needed) a repechage (a second-chance race for crews not directly qualified), quarterfinals, semifinals and the final (Final A for places 1-6, Final B for 7-12, etc.). Each round of an event must finish at least two hours before the next round of the same event, and at major regattas a rower should in principle not race more than once a day in the same event. (Rule 58; Appendix R7)

A Time Trial is a race in which crews start one after the other and the result is determined by each crew's elapsed time over the course; they may be used in cases of limited time or adverse/unequal conditions. For 2026, under the revised progression system time trials are required from 61 or more crews in an event (previously 49). In a time trial, times are recorded to the precision of the photo-finish system, and crews finishing less than 1/100 second apart keep the times shown by the system. (Rule 63; Appendix R8, updated 2026)

The 2026 Bye-Laws revise how crews advancing into quarterfinals and semifinals are distributed across races. The basic pattern remains the "snake" (serpentine) distribution, but it is adjusted so that the fastest first-place crew (1.1.H), fastest second-place crew (1.2.H) and the fastest time-qualifier (1.HT) are not drawn together in the same next-round race, and so that the sum of the ranks of the crews in each race is equal. The Executive Committee may also approve an alternate progression system for a specific event (previously allowed only at World Championships). (Appendix R7, 2026)

Crews must be attached to the start pontoons at least two minutes before the start time; the Starter then announces "Two minutes", placing crews under Starter's orders. After confirming the Umpire and Judge at the Start are ready and the boats are aligned, the Starter makes a roll call of the crews in lane order, then says "Attention!", raises the red flag (or shows a red light), and after a clear, variable pause gives the start by dropping the flag and saying "Go!" (or by switching the light to green with an audible signal). A Quick Start (no individual roll call, the call "All Crews") may be used in adverse weather. (Rule 68)

A crew commits a false start if its rowers begin rowing and its boat crosses the start line after the red flag is raised / red light shown but before the start command is given. The Judge at the Start alone decides who caused it; the Starter then stops the race (bell and waving red flag, or flashing red light and audible signal) and awards a Yellow Card to the offending crew(s). The start procedure restarts with the roll call. Only the crew(s) who actually caused the false start are penalised. (Rule 69)

A crew that causes two false starts, or that receives two Yellow Cards applying to the same race for any infringement whatsoever, is awarded a Red Card and excluded from the event. A red marker is placed adjacent to its starting position and the crew leaves the course. A crew arriving late at its starting position may also be awarded a Yellow Card. An objection to a start sanction may be made to the Umpire or Starter, who decides immediately. (Rules 68.2, 69, 70)

Crews are responsible for their own steering. Each crew has a lane reserved for its own use and must remain completely within that lane - including its oars or sculls - throughout the race. If a crew leaves its lane it does so at its own risk: if it impedes or interferes with an opponent, or gains any advantage thereby, it may be sanctioned without any prior warning. (Rule 71)

A crew causes interference if its oars, sculls or boat encroach into an opponent's lane and disadvantage that opponent by contact, wash or other distraction. The Umpire alone decides whether interference occurred. If interference affected the finishing position of another crew, the offending crew may be excluded (Red Card) - and in the case of a collision, even without prior warning. The Umpire may alert a crew about to interfere (white flag, naming the crew, indicating the direction) and may command "Stop!" (white flag vertical) for safety. (Rule 72)

When a crew is placed at a disadvantage, the priority is to restore its chances - the imposition of a sanction is secondary. The Umpire may stop the race, sanction the offender and order a re-row, or let the race continue and decide afterwards; the Umpire may not sanction the offender while leaving the disadvantaged crew's chances unrestored. It is prohibited to give any instructions, advice or directions to racing crews from outside the boat using any electric, electronic or technical device. (Rules 72 Bye-Law, 73)

In a close finish the Senior Judge at the Finish determines the order of finish from the photo-finish picture; systems running at fewer than 100 frames per second are not suitable. Intermediate and finish times are in principle recorded to 1/100 second. Where a difference of less than 1/100 second exists, crews may share a recorded time but have different rankings - except for races where time decides progression, and time trials, where the times shown by the photo-finish are used to separate crews. At World Rowing and Olympic regattas all posted times are taken from the photo-finish. (Rule 74 Bye-Laws)

When the order of finish between two or more crews is too close for any difference to be determined, the result is declared a dead heat. In a heat (or quarter/semifinal), if the tied crews cannot all progress to the same level of the next round, a Re-Row is held; if they would all progress anyway, no re-row is needed and their relative positions are decided by a supervised draw (in a quarter/semifinal, by previous-round ranking first). In a final, tied crews are given equal ranking and the next ranking is left vacant; if a medal position is tied, additional medals are provided. (Rule 75)

The Umpire may order a Re-Row to ensure fairness, for example where a started race is stopped before finishing due to weather or external influence, where interference requires restoring a crew's chances, or to resolve a dead heat. A re-row is run over the full course distance. For 2026, a new Bye-Law (Rule 65.1.e) provides that where progression is decided by comparing times across more than one race in the same round, those crews are deemed to be "in a race", so a re-row may involve crews from different races in the same round to decide who advances on time. (Rule 65; 2026 Bye-Law)

A member of the Jury may impose, in increasing severity: a Reprimand (formal admonishment); a Yellow Card (formal warning - two Yellow Cards applying to the same race become a Red Card and exclusion); Relegation (REL) (placing a crew last in a race, where the rules provide); a Red Card (EXC) which excludes the crew from all rounds of the event; and Disqualification (DSQ) which removes the rower or crew from all events in the regatta. A Yellow Card given before or during a race lapses only when the race is concluded, so it still applies to a postponement or re-row. (Rule 66)

A crew that considers its race was not in order must, at the finish, raise an arm to indicate an objection before the Umpire shows the white flag; once the Umpire has shown the white flag to the Judge at the Finish confirming the race was in order, no further objections are accepted. Any racing-conduct sanction by a Jury member must be awarded and communicated to the crew no later than one hour after the conclusion of the race (this limit does not apply to Control Commission or higher-body sanctions). (Rules 74, 76; Rule 66 Bye-Law)

Beyond an immediate objection, a crew or its federation may lodge a written Protest with the President of the Jury within the time limits set in the Rules; the President of the Jury (or the Board of the Jury) decides. A further Appeal against that decision may be made to the appellate body provided in the Rules and Statutes. Disputes, appeals and cases not expressly covered by the Rules are decided in the spirit of fair play by the competent body. (Rules 76-79)

The safety and health of rowers takes priority. Member federations must ensure rowers are medically fit and insured, and the organising committee must apply traffic rules governing how boats move on the course during training and warm-up to avoid collisions. In adverse weather conditions the Jury may delay, shorten, alter the programme, or use the Quick Start; under the 2026 revisions, alternative-programme provisions now refer to crew "rankings" (placing and time) rather than placings alone. (Rules 15, 16, 51-55, 64)

All rowers are subject to the World Rowing Anti-Doping Bye-Laws and the WADA Code. For 2026 the list of events whose participants are treated as International-Level Rowers (subject to testing, TUEs, whereabouts and Results Management) is expanded to include World Rowing Cup, World Rowing Championships (Senior/U23/U19), Coastal Endurance, Indoor and Beach Sprint Championships, the World Masters Regatta and Olympic/Paralympic qualification and Games regattas; participants in these events are not treated as exempt "recreational athletes". A definition is added that "crew" includes teams and relay events, reflecting the revised WADA Code. (Rule 86; Appendix R10, 2026)

The 2026 edition (Council-approved 17 February 2026, published 7 March 2026) keeps the core Rules unchanged - those can only change at a post-Olympic Quadrennial Congress - and updates the Bye-Laws and Regulations: (1) a ban on hull substances/riblets that modify the water interface or leave residue; (2) blood oxygenation added to permitted in-boat data; (3) a clarified boat-weighing procedure with removable-device rules and a per-class weight-allowance table; (4) a revised progression distribution (snake pattern with equal rank-sums) and time trials now from 61 crews; (5) re-rows extended across races in the same round for time-based progression; (6) anti-doping event-list and "crew" definition updates; and (7) a Jury conflict-of-interest rule. (2026 Rules Update, World Rowing)

Alongside flat-water (Classic) racing, World Rowing governs Coastal Rowing, raced in more rugged sea-going boats and detailed in a separate Coastal Rowing Rule Book. Its two formats are Endurance (a longer offshore race over a buoyed course, often a mass or interval start) and Beach Sprint (a short knockout-style format combining a beach run, a slalom around buoys and a sprint back to the beach, raced head-to-head in elimination rounds). Beach Sprint Rowing is on the programme of the LA 2028 Olympic Games, replacing the lightweight flat-water events. (Coastal Rowing Rule Book; Rule 32.3)

World Rowing also governs Indoor Rowing, raced on rowing ergometers (indoor rowing machines) that simulate the action of rowing, and detailed in the Indoor Rowing Rule Book. Races are decided by the distance covered in a set time or the time to cover a set distance (commonly 2,000 m or 500 m sprints), with results read directly from calibrated machine monitors. The World Rowing Indoor Championships are an official World Rowing event subject to anti-doping testing. (Indoor Rowing Rule Book; Rule 1)