Managing Hundreds of Open‑Water Swimmers: Referee and Lifeguard Strategies for Safety

Pre-Test with Rick Walker

Consider the Open Water Pre-Tests

Large open water events may place hundreds of swimmers on the course at one time. Managing that field requires more than adding a few lifeguards or assigning a referee to watch the race. A safe event depends on qualified swimmers, clearly separated responsibilities, a strong safety plan and a system that allows distressed athletes to be reached quickly.

Pre-race qualification is one of the organizer’s most useful safety tools. The objective is not to judge swimmers by appearance. It is to confirm that every entrant has demonstrated the fitness, skill and judgment needed for the distance and conditions.

Referees and Safety Personnel Have Different Responsibilities

The referee manages the competition. Safety personnel protect the swimmers.

At a major open water race, the officiating team may include a head referee positioned near the leaders, another referee observing the middle of the field and a third watching the swimmers toward the back. The exact staffing pattern may vary, but the referees are primarily concerned with the conduct of the race.

They watch positioning, contact, course compliance, turns, feeding activity and other matters governed by the competition rules. Much of the aggressive racing and many potential infractions occur near the front, where swimmers are competing for places. Officials must still observe the full field, but their presence does not replace a dedicated safety operation.

Lifeguards, rescue craft operators, paddlers and other safety personnel concentrate on signs of distress. They are not waiting to judge whether a swimmer has committed an infraction. They are watching breathing patterns, body position, changes in stroke, loss of direction, unusual slowing and other indications that help may be needed.

Keeping these responsibilities separate prevents officials from being expected to perform two demanding jobs at once.

Safety Coverage Must Move With the Race

A large field spreads out as the race continues. The leaders may finish while other swimmers remain far back on the course. Safety coverage should adjust as that separation develops.

One effective approach is to position safety personnel at stations along the course and shoreline. As the last swimmers pass a station, some of those personnel can move behind the field. The athletes at the back then accumulate additional supervision as the race progresses.

This is especially useful because swimmers who are fatigued, inexperienced or approaching a time limit may be more likely to need help late in the event.

The safety plan should be designed so that a rescuer can reach a swimmer in distress rapidly. The exact response target will depend on the venue, conditions, course design and governing requirements, but organizers should plan for immediate recognition and intervention rather than assuming that a struggling swimmer will be able to wait.

Entry in an Open Water Race Must Be Earned

Open water competition is not the place for a swimmer to discover whether they can complete the distance.

An entrant should already possess the swimming ability and conditioning required for sustained effort. A competitive open water swimmer should be capable of completing demanding pool training and maintaining control while tired.

Pool competence does not guarantee open water success, but it provides a measurable foundation. A swimmer who cannot complete an appropriate continuous pool swim should not be entered in a longer open water event simply because they are enthusiastic or physically strong.

The open water environment adds challenges that may not exist in a pool. These include cold or warm water, waves, currents, limited visibility, physical contact, navigation errors, anxiety and the absence of a wall every few seconds.

Organizers and coaches should therefore require evidence of readiness before the swimmer reaches the start area.

Judge Ability, Not Appearance

A swimmer’s body shape does not provide a reliable safety assessment.

A large, muscular swimmer may be highly capable. A lean swimmer may lack the endurance, open water experience or emotional control required for the event. Visual impressions should never replace demonstrated performance.

The proper question is not whether an athlete looks like a distance swimmer. The question is whether the athlete has shown that they can complete the required swimming under controlled conditions.

A swimmer who repeatedly stops during sustained training, loses stroke control under fatigue or cannot complete the required distance needs more preparation. The decision should be based on evidence from training or verified qualifying performances.

This approach is fairer and far more useful than making assumptions based on age, size or build.

Use a Verified Pool Swim as a Pre-Test

A continuous pool swim can provide a practical entry standard for an open water event.

For example, an organizer offering a 5-kilometer race might require swimmers to complete a verified 3,000-meter pool swim within a defined time. The appropriate distance and time should be selected by experienced event leaders and matched to the race distance, expected conditions and athlete population.

The pre-test does not need to copy the race exactly. Its purpose is to demonstrate that the swimmer can sustain effort, maintain technique and remain under control for a meaningful period.

Verification should come from a recognized coach, official or another person authorized by the event. A self-reported training result provides less protection than a signed and documented performance.

The organizer should publish the standard before registration closes. Entrants should know what evidence is required, who may verify it and when it must be submitted.

Match the Test to the Participants

An age-group race, masters race, college division and community swim may require different qualification procedures.

Age-group swimmers commonly enter through established programs where a coach knows their training history and can confirm readiness. Masters and unaffiliated swimmers may not have that same coaching structure. In those cases, a verified qualifying swim becomes even more useful.

A race that combines experienced competitive swimmers with recreational participants may need separate waves, different distances or different qualification standards. Placing every swimmer into one field without considering experience and pace can create avoidable congestion and risk.

The qualification process should reflect the actual event rather than being copied from an unrelated race.

Organizers Can Refuse an Unsafe Entry

Event leaders are responsible for protecting the swimmer, the safety crew and the other competitors.

Registration does not automatically guarantee the right to start. Organizers should reserve the authority to reject or withdraw an entry when the required qualification has not been provided or when credible information shows that the swimmer is not prepared.

A waiver does not replace responsible event management. It may document that a participant understands certain risks, but it does not prove that the swimmer possesses the necessary ability.

Clear entry standards make these decisions easier. Instead of debating whether a swimmer appears ready on race morning, the organizer can point to a published qualification requirement that applies to everyone.

Coaches Must Be Honest About Readiness

A coach should never approve a swimmer merely because the athlete wants to enter or because the team needs another participant.

The coach sees the swimmer in training and should know whether the athlete can complete sustained efforts without repeated rest, panic or serious deterioration in technique. The coach should also consider whether the swimmer has practiced sighting, turns, group swimming, starts and recovery from unexpected contact.

When a swimmer is not ready, the correct response is more preparation and a later race.

Preventing an unsafe start is better than relying on rescue personnel to solve a predictable problem during the event.

Plan for the Rescue of Powerful or Panicked Swimmers

Any distressed swimmer may become difficult to assist.

A frightened athlete may grab a rescuer, overturn a small craft or react unpredictably. Physical strength can make that situation harder to control, but panic is not limited to large or muscular swimmers.

Safety personnel need suitable training, equipment and craft. They should know how to approach a struggling swimmer without placing themselves in unnecessary danger. The safety plan must also include communication, escalation procedures and access to appropriate medical support.

Pre-testing reduces the likelihood of an incident, but it does not eliminate the need for trained rescue personnel.

A Pre-Test Protects the Entire Event

A qualification swim is not intended to discourage participation. It gives swimmers a clear target and gives organizers evidence that entrants have prepared for the challenge.

A sound pre-test can reduce preventable rescues, strengthen confidence among safety personnel and help the event place swimmers into appropriate races or starting waves. It also encourages athletes to prepare honestly rather than treating the competition as an experiment.

The final decision should be based on demonstrated swimming ability, verified preparation and the demands of the course.

Open water carries unavoidable risk. Careless entry procedures add risk that does not need to be there.


In this video lesson, Rick Walker breaks down the essentials of referee and lifeguard management for open‑water swimming events. Get clear, actionable safety guidelines you can apply to races of any size.

  • Referee staffing: three per race (head, middle, back) and their specific duties
  • Lifeguard deployment: station placement, pedal‑board volunteers, and the 30‑second rescue goal
  • Managing large fields: handling 400‑600 swimmers with shoreline stations and staggered lifeguard coverage
  • Swimmer screening: required pool time trials (e.g., 3,000 m under 45 min) to verify fitness for distance races
  • Organizer authority: how and when to decline entries and set qualification standards for safety compliance