Some units have also been communicating in the clear on civilian bands. There seems to be a severe shortage of military electronics on the Russian side.
Or, just purely from a UX standpoint, you can use a military receiver with an interface like this https://media.sciencephoto.com/image/c0083836/800wm and then look up the coordinates by hand on a twenty year old paper map. Or you can drop a pin on gmaps and text it to Sergey at the artillery battery. If you don't care about opsec, which is easier?
Or, just purely from a UX standpoint, you can use a military receiver with an interface like this https://media.sciencephoto.com/image/c0083836/800wm and then look up the coordinates by hand on a twenty year old paper map. Or you can drop a pin on gmaps and text it to Sergey at the artillery battery. If you don't care about opsec, which is easier?