GPS accuracy very bad !!

Effectivement, j'ai pas mal de grandes tours autour de moi... Mais mes autres GPS se comportaient mieux. Merci pour ton feedback !

Do you know how to activate the "Lock on road" ? I didn't find this option on Garmin connect.

High towers ? Don't look any further ! Trust me high flat tower are playing with GPW reception creating "teleporting" behaviors.
If you still got your previous models, try both watches on the same wrist (it's important) and compare how the tracks are drawn on both. :-)

Oui, les grandes tours du 13eme :)

Thanks for your help, I didn't know I had to deactivate system parameters for the map to have the option appearing. I will try with it.

I have the Fenix 3 HR and it is completely incapable of registering distance accurately. I have checked it against surveyed points over a period of 18 months many times and it fails consistently and is off by 10%! It also keeps registering distance when you stop walking. I was going to get a 5 but I see that registering distance accurately still has Garmin stumped on their watch devices. My bike (1000) and hiking (Oregon) Garmin devices register distance very well. Not sure what the watch problem is.

I was not aware that the lock on road option would affect the gps position recording of the watch - only impacting the cursor on the map screen. At least this was the case for F5X, did this change with F5X+?

It used to on my 5X : straighter tracks and less anomalies.
But the 5X+ doesn't seem to care about it...

I don't prefer using lock on road option, 'cos when GPS signal is very bad it locks me on wrong roads. :D

GPS + Galileo option may not be good yet. There are limited number of Galileo satellites on the sky yet. Sometimes my phone sees 2 sometimes 5 or even 6 Galileo satellites. However, GPS and Glonass satellites are much more in number. So it won't help if there are only two Galileo satellites on the sky and watch can't track them due to signal loss or reflections from the buildings.

I am happy with the GPS on my 5 Plus. I have been comparing it to the new Suunto 9 side by side for the past few days and both have their good and bad moments.

I don't prefer using lock on road option, 'cos when GPS signal is very bad it locks me on wrong roads. :D

GPS + Galileo option may not be good yet. There are limited number of Galileo satellites on the sky yet. Sometimes my phone sees 2 sometimes 5 or even 6 Galileo satellites. However, GPS and Glonass satellites are much more in number. So it won't help if there are only two Galileo satellites on the sky and watch can't track them due to signal loss or reflections from the buildings.

But the Garmin do not add GPS and Glonass it chooses the best reception: or GPS or Glonass by the number of sat available.
Is there a change on the Plus series ?

Do you mean it uses only either GPS or Glonass if GPS + Glonass option is used? And Galileo or GPS if GPS + Galileo setting used? In my latest runs I saw GPS + Galileo gives really good distance information. GPS + Glonass is close but worse and GPS only is the worst. If there are two or three Galileo satellites on the visible sky then it should use GPS but GPS only results are worst? So someway GPS + Galileo beat GPS only mode but by using only GPS satellites or dismissing ten GPS satellites and using 2.5 Galileo satellites?

I believe Garmin adds GPS + Glonass or Galileo satellites in its calculations, otherwise that option wouldn't help anything.

I'm 100% agree with you as it would be logical knowing how scarce the Galileo satellites are in the sky. (Just checking with my Samsung S8)
But in one the old 5X reviews I remember finding back then that the 5X was choosing the best satellites "fleet" not adding both fleet.
I remember seeing comparaison of the numbers of satellites available Glonass being less in number.
Perhaps they update that behavior with the new chipset ? Perhaps that review was wrong for starters ?
Anyway I have never found GPS+Glonass (on the old 5X) bringing better tracks than GPS alone.
Now I'm on GPS+Galileo for my walking sets and Ultratrac for Track me set (used mainly in off road cars).
The 5X+ is really faster than the 5X in acquisition and fix.

Perhaps Garmin team could answer to us about that ?

On first Fenix, we had a bar graph with all visible sat on the watch. It was very useful !! It should be great to have Garmin putting it back again !