BEST EVER GPS Track
Very exciting news from last week’s 10-mile test.
A new, as yet unreleased GPS watch, got the best-ever GPS accuracy score beating recent Garmins, recent COROS watches, all Apple Watches and the good old V800 and AMBIT 3.
Q: What was remarkable about the test result track?
A: It actually showed where I ran…most of the time. Incredible. After all these years.
The new dual-frequency chips are supposed to properly handle reflected GNSS signals and that in itself should be the biggest improver of accuracy we see in the current raft of technology. I had some excellent results in that regard from the new watch on this test, yet still, it could have done better on one part of the test where it was intentionally impacted by reflected signals from high buildings and a tunnel.
One part of the test is impossible, so a 100% track will probably never be achieved other than by luck, so this 92% score is probably pretty close to the best that can be achieved. At least on this run. I reckon if I re-ran this test 10 times, the watch would score between 87% and 95%.
Even though 92% sounds quite a bit better than 85%, there are always vagaries that mean that most of us would never really spot the difference unless we looked super closely. Indeed, the Forerunner 965 test shown above as 83% probably reflected a bit of bad luck on Garmin’s part and over months of usage you probably wouldn’t be able to distinguish its GNSS performance from the Epix 2.
Q: When do we see the mystery sports watch?
A: Soon
Take Out
Wow.
Last Updated on 27 January 2026 by the5krunner
My favourite kit and nutrition
- Injinji – Runners protect your toes. Avoid discomfort and minor injury. Run more. run faster. I use them.
- Garmin 90-degree charging adapter — the small adapter that keeps your charging cable tidy at the stem. Essential for race day. I use one.
- Garmin charging puck — the fastest and most reliable way to top up your Garmin before a session. I use one.
- Ravemen FR300 — front light that mounts directly under your Garmin or Wahoo head unit. Keeps your bars clean and your beam pointed where it matters. I use one.
- Body Glide – The Blue anti-chafe stick that all swimmers and many runners use. I use it.
- Maurten — the race nutrition trusted by elite athletes. Gels and drink mix engineered to be easy on the stomach. I use them.
- Garmin Varia RTL515 — radar rear light that alerts you to vehicles approaching from behind. Pairs with your Edge or Garmin watch. I use this model.
- Favero Assioma Pro RS2 — the power meter pedals most serious cyclists end up choosing. Accurate, easy to move between bikes. I use this model.
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. ID
