Suunto 9 Baro - compass calibration before every run?

[surfboomerang]

@Dimitrios-Kanellopoulos My GPS track is fine (really good even). Spot on the roads and no corner cutting. So in “Best” mode I don’t think the compass is of any influence.
Strange that @Popuhsquat reports strange behavior if his compass isn’t calibrated before the run

[Dimitrios Kanellopoulos]

@surfboomerang sorry I was refering to @Popuhsquat

[A Former User]

I think one way to tell whether compass has anything to do with GPS accuracy in Performance mode would be to set a significantly wrong magnetic declination. I remember having strange issues with Ambit3 GPS accuracy once when my magnetic declination was off by 33° because I confused E vs W when setting the declination. I don’t know if that was a coincidence but it may be worth checking.

[Fiox89]

Hello guys, I reopen this topic because I have the same problem, which seems strange to me. I have noticed that the watch shows me a wrong direction in navigation mode when I do not calibrate the compass before each start.

If I do the calibration before the start, the indication of the direction becomes exact.

I have also noticed on some occasions that compass calibration is required after starting the activity. I’m using a SSS.

Is this a hardware problem? already tried reboot and factory reset. I have not set any declination

[sartoric]

@Fiox89
Sometimes compass needs to be calibrated again.

But what do you mean when you say “the watch shows me a wrong direction in navigation mode” ?
Are you referring to the moving direction on the route (the route arrow) or to the “compass” needle and route orientation ?

[Fiox89]

@sartoric when I navigate a route on the watch, and for example I’m sure I’m on a straight section, the arrow shows me as if I were facing in another direction, but I’m sure I’m facing in the right direction. When you are on a straight stretch you expect the arrow to indicate the direction of the straight stretch

I noticed this problem even after only one or two days from the last compass calibration.

The problem seems to be getting worse if I move 50/60 km from the place of the last calibration, for example when I go in the mountains

Everything is resolved immediately if I interrupt the exercise and do a calibration of the compass, then I start the exercise again with the same track and the direction is fine with the route

[sartoric]

Well, starting an activity in a different place (bit far from the previous one) is usually one of the situation when you’re asked to re-calibrate compass.

Another case is if you kept the watch near magnetic or electric stuff for a while.

[Fiox89]

So you assume that it is quite normal? when I had my trusty ambit 3 I never had these problems, done the calibration only the first time after turning on… sigh

[Dimitrios Kanellopoulos]

Hi every time you connect the watch to the magnetic charger the watch needs a compass calibration due to the strong magnetic field of the charger.

Compass should be asked to be calibrated when it has an error. The preivous user of this thread had magnetic gloves.

Do you happen to have some magnetic interference in your area?

IF the calibration is asked once per run that is normal.

[Fiox89]

@Dimitrios-Kanellopoulos Well then it may be the charging process, I have no gloves or other possible magnetic interference. I will try to observe if this happens after charging the watch then. Thanks for the advice

[Dimitrios Kanellopoulos]

@Fiox89 come back here if you still experience issues.
In general, you can calibrate a compass, even if the watch does not ask it (applies also to mobiles eg google maps etc) by doing manually that 8 figure gesture.

Digital compasses can understand most of the times if they are uncalibrated when a big electromagnetic change happens eg the magnetic charger that the Spartans have.

I hope it clears up a bit.