Sighting Technique: The Key Training for Swimming Straight in Open Water

Introduction

Research has documented the actual swim paths of triathletes: on a 1.5 km course, some athletes actually swam nearly 1.8 km—the extra 300 meters was almost entirely due to zigzagging from poor navigation. In a race where every second counts, this can be the difference between standing on the podium or not.

Sighting in open water (also known as head-up navigation or directional sighting) is the technique of briefly lifting the head during the swim to confirm direction before continuing. It sounds simple, but sighting accurately while minimizing energy expenditure requires systematic practice.

The Fundamentals of Sighting

Why Do Swimmers Drift Off Course?

Everyone’s body has slight left-right asymmetry: the dominant arm is slightly stronger, and the stroke arc differs slightly. In a pool, the black line corrects for this, but in open water the cumulative effect is obvious. Even highly skilled swimmers can drift 2–5 meters per 100 meters without sighting—that’s 30–75 meters of deviation over 1,500 meters.

When Should You Sight?

Sighting more frequently is not necessarily better—every head lift comes at a cost:

Proper Sighting Technique: Two Main Methods

Method One: Forward Sight

This is the most commonly used sighting method:

1. After completing a full stroke, lift the head naturally as both arms extend forward
2. Only the eyes need to clear the water (the so-called “crocodile eye”), looking forward to locate the target
3. After confirming direction, immediately lower the head, complete the breath, and continue swimming

Key point: A common mistake beginners make is lifting the head too high—this causes the hips to sink, increases drag, and wastes extra energy. Just get the eyes out of the water and find the target.

Method Two: Sight-Breathe Combo

An advanced technique that reduces the energy cost of additional head lifts:

1. During a normal head-turn breath, briefly glance forward before the head returns to the water
2. Requires breathing to the right side (with the dominant eye facing the target direction)
3. Smoother, but requires extensive practice to master

Target Selection Strategy

Choosing a good sighting target is almost as important as the sighting technique itself:

• Prioritize tall, fixed objects: Hills, buildings, and lighthouses on shore are easier to spot in waves than buoys on the water
• Remember landmarks behind turn buoys: Buoys themselves are hard to see in waves, but buildings on shore behind the buoy don’t move
• Reconnoiter the course beforehand: For the Sun Moon Lake swim, you can memorize simple cues like “swim toward Xiangshan Hall”
• Use the sun’s position: Taiwan’s summer races are often held at dawn, so you can use the sun’s azimuth to help determine direction

Sighting Drills in the Pool

You can practice sighting technique even in a pool:

• Black line drill: Swim 3–4 strokes with your eyes closed, then lift your head to check whether you’re still in your lane
• Wall sighting: When swimming toward the pool wall, practice lifting only your eyes to look at the wall, not your whole head
• Float drill: Place a water ball at the other end of the pool and practice swimming a straight line toward it

Practical Tips

• Familiarize yourself with the course beforehand: After arriving at the race venue, stand at the start and carefully study the route, memorizing the shore landmarks at each turning point
• Use a buoy for sighting practice: Bring a brightly colored pull buoy during training so you can confirm from shore whether your swim line is straight
• Have teammates observe each other: Ask a partner to watch your swim line from shore and give you immediate feedback
• Account for current drift: In environments with current (such as the shallow current zones of Chengcing Lake), deliberately aim upstream to compensate for drift

Conclusion

Sighting may seem like a minor detail, but it is a major source of efficiency differences in open-water swimming. Whether you’re a recreational enthusiast preparing for the Sun Moon Lake swim or a triathlete in training, spending time practicing sighting systematically will save you hundreds of unnecessary meters in the water, leaving more energy for the latter part of the race. Remember: in open water, swimming straight matters more than swimming fast.

Related Reading

• Open Water Straight-Line Swimming: Head-Up Frequency and Timing for Buoy Sighting
• Open Water Navigation: Head-Up Breathing and Target Point Positioning
• The Complete Guide to Open Water Positioning: The Sighting Head-Up Method Every Triathlete Must Learn
• Open Water Positioning and Navigation: Visual Correction and Energy-Saving Strategies for Swimming Straight