Interestingly, buried in this article is an aside that on one day the Ukrainians hit 14 Orlan UAV’s. You have to wonder, assuming it’s accurate, if this is a sustainable rate of loss and replacement for Russia, given restrictions on western tech like computer chips.
They have found small navigation tools ductaped to shot down Russian airplanes.
The ones they were built with are useless and they don’t have the chips/skills/budget to replace them.
The military equipment would need specific chips to be repaired, while I assume the stores in Russia still have a stock of automobile GPS units available. Whatever works. You would just have to navigate your aircraft to target by following highways, I guess. And turn off the audio so it wasn’t constantly nattering “recalculating… recalculating… make a U-turn… Your destination is on the right…”
IFR. 
Whatever works indeed. I recall that, during the first Gulf War, allied fighter airplanes weren’t equipped to detect the obsolete K-band radars that the enemy was using. So a call went out to Whistler Group for automobile radar detectors (fuzzbusters), which were then modded. A spokesperson from Whistler mentioned being highly impressed by the skills of the United States military technicians saying: “They knew exactly where to drill the circuit board and which modifications were necessary.”
May be an urban legend, but the story was that the president of Whistler Group offered to sell all of the detectors the government wanted at the civilian price, but refused to do any modifications or fill out any paperwork. “If I did that I’d have to increase the price accordingly, and then I’d see my name in the papers in a story about gouging the government. I’ll put them in camouflage boxes, but that’s as far as I’ll go.”
IIRC, consumer GPS devices are programmed to not work at excessive speed, precisely so they can’t be used in a guided missile. And a fighter jet’s speed is comparable to a long-range missile’s.
There are relatively cheap civilian aviation GPS units for sale - and have been, since the 1990’s or 2000’s - that don’t have the limitations of the automobile units. Back when I used to fly ultralights and vintage airplanes we would, yes, duct tape the units to the aircraft because, most of them being open cockpit, it’s really really annoying when one falls out of the airplane and gets lost in the field a mile below you.
So this sort of cobbled-together solution isn’t new at all. What’s sort of weird is that people are fighting wars with that sort of jury-rig.
Some experts are now saying that rather than WWII or Vietnam, the war is starting to look like WWI, complete with trench warfare and all the ugliness that entails.
Happened on a small plane to my Wife and I in Costa Rica. Weather had shut down the airport we where scheduled to go to and they decided to go to another to get us close(r).
A ground crew rubber banded a GPS unit to the pilots yoke.