GPSMAP 66i - Recent Threads

abnormal infromation in "Recording Controls" and "Trip Computer"

Former Member — Mon, 20 Oct 2025 11:07:06 GMT

Good evening, everyone.

I encounter some problems with GPSMAP 66i.

Have you ever encountered such problems?

RE: abnormal infromation in "Recording Controls" and "Trip Computer"

1424693 — Wed, 10 Jun 2026 15:45:27 GMT

Yes, I've seen similar issues before. In some cases, it was caused by a temporary software glitch or corrupted activity data. A restart of the device and checking for the latest firmware update helped resolve it. Could you share a screenshot of the abnormal values you're seeing?

Track not in Track Manager.

1992102 — Wed, 06 May 2026 00:16:11 GMT

Sorry if I am posting in the wrong place. I was unable to find an area for the Garmin GPSMAP 65s which is what I have. I recently synced a collection to my device. The track I want to load is in the Collection Manager but not in the Track Manager. Why not? Is there a solution to this problem? - Scotty

P.S. Updated device software today.

how to skip inrich activation

3290483 — Sun, 29 Mar 2026 04:44:50 GMT

Hello,

Because of some problems with the newest firmware, I choose 6.30 for my 66i. Every time turning on, it want me to activate the inRreach. Is there a way to avoid it?

Thanks.

RE: how to skip inrich activation

skyeye — Sun, 26 Apr 2026 13:33:02 GMT

InReach devices need to be activated in order to operate. Non activated device is not very much useful.

What do you want do with an InReach device which is not activated?

RE: abnormal infromation in "Recording Controls" and "Trip Computer"

Former Member — Sun, 15 Mar 2026 00:11:46 GMT

calibrate what right?

RE: abnormal infromation in "Recording Controls" and "Trip Computer"

9695440 — Wed, 17 Dec 2025 15:44:20 GMT

From my experience, this usually happens when the GPS signal isn’t strong or the device isn’t calibrated right. I just check the signal and maybe restart it, and it mostly works fine.

RE: Setup - Recording - Auto Start

skyeye — Wed, 19 Nov 2025 20:16:21 GMT

but does it not end the recording when switched off?

Setup - Recording - Auto Start

Former Member — Sun, 09 Nov 2025 14:05:29 GMT

Good evening, everyone.

Track Settings Explained on the GPSMAP 66i/67i/86i/86sci:

Auto Start

When enabled, the handheld will start a new recording automatically when the previous recording ends.

Is it true? It seems to me that it starts when it is powered on.

Error trying to update software and map

1704604 — Fri, 07 Nov 2025 20:09:00 GMT

I am receiving an error while trying to update the software and map through Garmin Express. I have factory reset the unit, it connects but will not even begin the update without a red error message.

Software Version after Master Reset

Former Member — Fri, 07 Nov 2025 02:43:10 GMT

Good morning, everyone.

After Master Reset, the Software Version of my 66i is 10.20, the latest version, not the factory default.

How about your 66i?

RE: Software Version after Master Reset

JungleJim — Fri, 07 Nov 2025 06:16:35 GMT

That’s normal, a factory reset will clear out user data and settings. It will no revert the installed firmware to a previous version.

RE: Auto Save - Daily doesn't work?

reinhardz — Sat, 18 Oct 2025 23:00:37 GMT

Ah, thanks!

Auto Save - Daily doesn't work?

Former Member — Tue, 14 Oct 2025 02:25:56 GMT

Good morning, everyone.

I tested "Auto Save - Daily," but there is only "Current Activity" in "Recorded Activities" and nothing in "Saved Tracks."

I tested it this way:

Setup - Reset - Delete All;

Setup - Recording - Advanced Setup - Auto Save - Daily;

Setup - Display - Battery Save - On.

Software version is 2.90.

Move the 66i outdoors one day evening, the next day morning, I get the result above.

Where is the problem? What should I do to see the result of "Auto Save - Daily?"

Thank you so much in advance.

wrong "date modified" of .fit and .gpx

Former Member — Fri, 17 Oct 2025 00:29:53 GMT

Good morning, everyone.

What I do as below:

reset - delete all

setup - recording - record method - time; interal 3 seconds; advanced setup - auto save - daily.

20251016 11:29 local time to start recording; 16:44 lose signal; 17:04 power off; 20151017 06:37 power on.

Then the "date modified" of .fit and .gpx is 16 May, 2025.

Is it a bug?

RE: wrong "date modified" of .fit and .gpx

Former Member — Sat, 18 Oct 2025 02:59:02 GMT

When there is signal, the date and time is October 18, 2025 10:20AM; When signal lost, it changed to May17, 2025 07:26.

I've already contacted Garmin.

Have you ever encountered such a problem?

RE: Auto Save - Daily doesn't work?

Former Member — Fri, 17 Oct 2025 23:37:48 GMT

Two days should be separated. If record contunuously through midnight, it is considered one day.

RE: Auto Save - Daily doesn't work?

reinhardz — Fri, 17 Oct 2025 21:57:41 GMT

How?

RE: Auto Save - Daily doesn't work?

Former Member — Thu, 16 Oct 2025 23:23:10 GMT

Resolved.

RE: Ascent - Average: The average vertical distance of ascent since the last reset.

skyeye — Tue, 14 Oct 2025 09:36:29 GMT

I would first ask: how is anything vertical measured at all?

Air pressure will definitely depend on the weather and this has as we know not much constants

Ascent - Average: The average vertical distance of ascent since the last reset.

Former Member — Fri, 03 Oct 2025 06:29:24 GMT

Good afternoon, everyone.

GPSMAP 66i manual, page 46, Data Fields:

Ascent - Average: The average vertical distance of ascent since the last reset.

Would you like to explain how it is calculated?

Thank you in advance.

Vertical Distance to Destination

3108822 — Tue, 30 Sep 2025 03:45:40 GMT

Any suggestions to fix incorrect Vertical Distance to Destination readings? When I'm hiking, the field displaces incorrect elevation distances, for example, showing a positive gain when I'm on a peak and destination is below at the trailhead, or vice versa showing a negative distance when I'm heading to higher elevation.

RE: Vertical Distance to Destination

skyeye — Tue, 14 Oct 2025 09:30:53 GMT

I would first try to figure out how this is measured in first place. GPS altitude is not very precise, so barometric preasure can be used. But this is dependeing on the changes of air pressure and also wind strength etc. So there can not be any kind of absolut numerical data for this.

RE: MapShare issues

jlg2 — Mon, 13 Oct 2025 21:13:03 GMT

MapShare has worked well for me including as recently as August 2025. Like you, I don't carry a smartphone when on foot in the backcountry. I assume you are aware of the multiple and easy-to-overlook settings on the Explore website that all have to be correct for your Iridium track points to appear.

The word "uploading" in your original post was a little equivocal. From the context, I think it's clear mean track points sent through the Iridium network and not tracks uploaded later through an Internet connection.

MapShare issues

5941231 — Sat, 27 Sep 2025 20:02:42 GMT

My Gpsmap 66i stopped uploading tracks (in fact all data) to MapShare. I have reset the device several times and verified all settings in Garmin Explore. My subscription is active. The device Bluetooth and Wi-Fi settings are turned off to save power.