That article is ridden with falsehoods. The Su-34 was not manufactured in the early 1990s. It entered service in 2014. The cockpit and avionics aren't the same as those in the initial flyable prototype. Which was basically a dual seater Flanker.
How many "early 1990s" aircraft do you know with a glass cockpit with color LCD panels?
Older aircraft like the Su-25 or early versions of the Su-27, without the upgrades, might still use ad-hock solutions like commercial navigation devices. These devices might even have been used with more advanced aircraft at a certain point in foreign operations like in Syria. The GLONASS network only came back 100% on line in 2011. And even then GLONASS never was as accurate as GPS in lower latitudes. In their own territory it is accurate enough. GLONASS is more accurate than GPS closer to the poles, and less accurate close to the equator.
There were images of Su-34's using garmin GPS's on the dashboard in Syria, so it is not new but it doesn't imply the planes' GLONASS system isn't working, either and not all Su-34's had them, so it might be personal preference of each crew, too.
Syria is further south. GLONASS is more inaccurate there. It also might have been retained by the crew in case GLONASS failed for whatever reason and be used for backup.
It seems fud from one of Johnson's clown, given that Kalibrs don't seem to be lacking on the precision front unless they are taping comercial GPS to them, too. Also the UK seems incredibly invested in this war, for some reason.
Lol. No. Like I said, Ukraine is in the same latitude as territory in the Russian Federation. So GLONASS should have enough accuracy there. And GPS accuracy is shit near the North Pole, so it isn't bulletproof either.
