Garmin Connect and wrong information about speed and altitude

What else?
I just did show in this activity data below information: Average speed 825 kmh, Average speed of movement (What is this?): 838km/h. Max. Speed: 126,2kmh. It is simply stupid. Average speed is much more higher then max speed?

I was in aircraft. For sure we were much more higher then it is on the graph it was more then 1500 m.

If the aircraft was pressurised, then the barometric altimeter will show wrong altitude. This is normal and the only solution is to use GPS altitude.

Second, Speed graph: average speed is 825 km/h (I think it was) and below on the graph there is on the graph 100-120 km/h maybe.

Why? Shouldn't be 800km/h?

This is a known limitation of garmin's fitness devices, which do not show correct speeds above about 250 km/h. The technical theory is that only a single byte is allotted for speed, which is enough for fitness applications, but fails when used in aircraft.

Average speed of movement (What is this?)

"Average moving speed" is average speed excluding parts where speed was zero.

I know that pressured aircraft is with quite stable pressure which means the Altimeter shows wrong Altitude. Then I want to use Altitude GPS, but if I know that and also I want to have those data I have problem... in GC or GCM there is no way to get this information. More information I can get from my old 60CSX then this watch. Example: you are not able to use "Trace Me" / "Follow Me" activity - you won't get Altitude correct information after that.

I don't know if cry or smile... Average moving Speed :). Aircraft didn't stop. Of course I understand some seconds of problem with measurements. But It is stupid when you see at the graph and data below and see that nothing match. And the second if I wanted to have fitness toy I would pay two times less and choose other device. Moreover, fitness device have better Altitude information then Fenix5X+, why? simple: they have no barometer so information about Altitude is taken from GPS signal.

I hope Garmin will take care this case if not then the quesiton is if I should send back this device to them and ask about money.

I do not think those issues are so hard to make in this kind of device.

I think you missunderstood my problem. I do not want to use it in the aircraft. I just used situation I was in the aircraft to make tests. What it shows:

1. Data which we see during activity can be different in GC/GCM.
2. Data which we see are wrong. And I think they should fix this problem.
3. which activity I use it? fitness (like running) but also climbing. And in this activity Fenix 5X Plus has a problem, I think. the main problem is that during AutoCalibration (during Activity) the device is taken DEM algorithm and cartographic data and it should be set by user. The reason is simple: if you are in the wall the altimeter is calibrated to the ground which is below. I do not want to turn it off because of the changing weather during the day. When I make test during some flights it shows this problem. The device is not able to calibrate to your real altitude. I described my first tests here: https://forums.garmin.com/forum/on-t...limeter-issues
in the aircraf it is easier to show the problem (you are in some place "on the map" but not near to the ground). similar test can be done on cranes (50+meters) or bridge (I am not sure). both I haven't but last week I had flight so I did check it.

the problem is not with me that I want to use it as a aircraft altimeter. no, I do not want. the problem is that the device is not able to make AutoCalibration during activity.

during those tests it turned also that the problem is also with speed and correct data in GC/GCM. it is simply not professional. And i treat GARMIN as professional company. So, I hope they can solve this issue.

you wrote that GPS is not enough for elevation gain in low speed. I was climbing in August (low speed), I had AutoCalibration ON during Activity, and when I reach the peak I had 2800m (more less, I think in that post above I put link to my Activity) and it should be 3000m. so, it is not working properly.

When I was using 60CSX (it also has got Barometer) it shows +/- 10m altitude, And I also made tests in aircraft. that's why I think the problem is with AutoCalibration and DEM algorithm which is probably used there. if they give us AutoCalibration by GPS then it can fix the problem in my opinion.

Activity Climbing I mean Climbing in the wall, tower to the peak, not going to the peak by some path.