Open waters swimming distance don’t match

[Bulkan]

Today I did a test and swam with the Garmin 935 in one arm and the Suunto 9 Baro in the other.

Garmin 935 distance 608 meters.
Garmin connect reports 608 meters too.

Suunto watch 520 meters.
Suunto app 618 meters.

In Strava the distance is the same of the Suunto app.

Does anyone why?

Which one is correct?

[johan6504]

I would normally trust the distance of the S9. I have used it several times a week during the summer and it has been spot on every time, with excellent tracking. I have however never seen the distance differ between the watch and SA.

[johan6504]

If you go back to the activity in the watch does it still say 520m?

[Bulkan]

@johan6504 After the sync yes, I will check it later and see what it says.

Is important because in open waters the only tool you have is the watch so I hope the watch is the right one.

[Dimitrios Kanellopoulos]

Link please ?

[Bulkan]

@Dimitrios-Kanellopoulos You have the files and screenshotes, let’s see if this happen to more people.

For me the right distance is the one from the watch, than is the same in https://quantified-self.io/home, so I don´t get why Suunto app is reporting another distance, and specially the same than the garmin, when the track of the garmin is obviously worst…

The important thing is than the watch report the right distance because is the one you use in open waters…