By SwimSwam Partner Content on SwimSwam
Courtesy of Competitor, a SwimSwam partner.
When swimmers are racing or training at full speed, the last thing they should have to think about is where they are in the lane. They need to trust their surroundings, to know when the wall is coming, stay centered, and move confidently with every stroke.
That’s where pool and lane line markings come in.
If you manage or maintain a competitive swimming pool, these markings do more than make the pool look official. They improve safety, support performance, and help your facility meet competition standards.
What are the different pool and lane line markings?
High-level swimmers often practice in the same pool but travel around to different locations for competitions. Recognizing the following markings ensures swimmers feel comfortable no matter what pool they are competing in at the time.
1. The Centerline
When you look at the bottom of any competition pool, you’ll see a dark line running straight down the middle of each lane. That’s the centerline.
This line, referred to as the centerline, serves a few important purposes:
Helps swimmers stay aligned and swim straight Prevents unnecessary contact with lane lines Supports circle swimming during team practicesIn training environments where multiple swimmers share a lane, athletes typically stay on one side of the centerline and switch sides after each turn. Without that visual guide, maintaining a straight path, especially during longer sets, becomes more difficult.
2. T Mark
As swimmers approach the end of the pool, the centerline ends in a T-shaped marking on the bottom.
This mark is critical for turns, signaling to swimmers that the wall is just ahead. Competitive swimmers train to recognize this visual cue so they transition smoothly into a flip turn or open turn without gliding too long or cutting their stroke short.
When installed clearly and at regulation distance, this marking becomes second nature to experienced athletes.
3. Target Line
There is also a plus-shaped marking at the end of each lane on the wall, referred to as the ‘target line’. This is a critical marking that gives swimmers a focal point as they approach the wall.
It helps them:
Stay centered when finishing a race Maintain alignment during turns Avoid unnecessary contact with lane lines4. Lane Line 15-Meter Mark
Competitive lane lines aren’t just there to separate swimmers and reduce wave turbulence, they also provide important visual markers.
Most racing lane lines use a disc with a contrasting color to mark the first and last 15 meters of the pool. That mark is especially important in backstroke, butterfly, and freestyle events, as swimmers must break the surface of the water by this point to avoid being disqualified. That contrasting disc serves as a clear resurfacing cue for swimmers underwater.
And for facility operators, having properly configured lane lines with a 15-meter mark helps ensure your pool is meet-ready and compliant with competition standards. Our lane line wizard makes it easy to customize your lane lines and add a 15-meter marker so you get exactly what your pool needs.
5. Backstroke Flags
Backstroke swimmers have a unique challenge: they can’t see the wall as they approach it. This makes backstroke flags a critical component in any pool environment, giving backstroke swimmers a visual reference point so they can count their strokes and time their turn accurately.
Without properly placed flags, backstroke finishes become inconsistent and potentially unsafe.
Facility managers can quickly design and order custom backstroke flags using our Backstroke Flag Wizard, elevating both the aesthetic and functionality of your pool.
Why Do Pool Markings Matter for Your Facility?
Clear, visible pool and lane line markings, in addition to properly installed backstroke flags, do more than check a regulatory box.
They help…
Improve safety: Swimmers can better judge their position and wall approach. Support performance: Clean turns and straight alignment save time. Build confidence: Athletes train and compete more effectively when they trust their environment. Prepare for meets: Proper markings ensure your pool is competition-ready.When markings fade, contrast poorly with the pool surface, or equipment isn’t properly installed, it impacts both training quality and race-day readiness.
Competitor Swim is committed to enhancing your pool environment with safe, durable equipment that lasts – even in harsh environments.
Visit our website to learn more about our product line.
About Competitor Swim
Since 1960, Competitor Swim® has been the leader in the production of racing lanes and other swim products for competitions around the world. Competitor lane lines have been used in countless NCAA Championships, as well as 10 of the past 13 Olympic Games. Molded and assembled using U.S. – made components, Competitor lane lines are durable, easy to set up and are sold through distributors and dealers worldwide.
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