GPSMAP 67i not working without GPS?

9078180 3 days ago

Hey everyone, im a hiker, explorer but also a developer and innovator.

As part of that i am working in ukraine to support some critical efforts there.

In Ukriane and especially in zones like that (not my only difficult place) and especially in support zones the GPS signal is spoofed and jammed. (both).

Now i have specifically bought the 67i as the support and outdoor rep that i interviewed for 1 hour said that it works for positioning AND messaging over multiple avilable constallations.

GPS, GLONASS, Galileo, QZSS, BeiDou, and *IRNSS.

BUT the reality was that the moment GPS is gone (spoofed and or jammed) i can no longer even use the device. It will jump to the false gps location even though it got good lock on and true position on some of the other constellations (e.g. Galileo).

So how to fix this?

Is there a solution for priority overwrite? Can i disable a channel? Can i force localisation over other networks?

0 9078180 3 days ago

Just as a follow up, i did some research and asked for advice on some of it. So when i was for example close to Kyiv there was of course at times during air raids broad spectrum wide coverage GPS jamming. Just noise. So no, of course in this situation i am sure no handheld device will work. At least not in this caliber.

BUT

Most of the time its "just" GPS and Glonass that is blocked. Especially with multi band support and anti-spoofing etc. etc. available there should be some reception.

I did test my M10chips that i had with me anyways, and on my notebook i can get a positive lock. Down to 50m approximate. Not bad at all. That was L1 and L5 Galileo and smth. else. But my point is, there are options and it should not be GPS first, black and white.