Just by listening to the radio the American Special Forces are picking up a lot of valuable information about the tactics the Germans are using all they need to do is to have the imagination to incorporate it in to their training.
Not really. Not at all, actually. No one should be able to understand the meaning of any German transmission (or Polish, for that matter), other than the person/unit (or that unit's parent) to which it was addressed.
This whole radio thing doesn't make sense to an old US Marine Grunt - a combat infantryman. In '68 the radio communications between the various USMC units (Companies, Battalions & Regiments, right up to the CMC's office), would be encrypted, often using one-off code pads. So, I am sure that ITTL, the Germans would be doing at least something similar.
Then again, the Germans have always been technologically adept, so they could possibly have early digital communications, in which case there is no one-off pad or laborious encoding into code groups because doing so isn't necessary anymore. With a possible "early" (for OTL) digital signal encryption, there'd be nothing for the 1st SFG - or anyone without the ever-changing encryption key - to listen to except for a bunch of static.
Even without digital encryption, military communications are deliberately designed to be hard to decipher. Have you ever listened to an actual military radio operator? "4 clicks Yellow to Waypoint 73, Green to Objective Delta." Doesn't make much sense, does it? But, It Does, the message has just been encrypted. It could mean that someone is 4 clicks (kilometers) N/S/E/W of "Waypoint 73" which is a specific Lat/Long. location...perhaps. Or Not.
"Green to Objective Delta" Does that mean it's safe (green) for someone to go to to a location ("objective delta"?) already known to be clear? Does any of it make sense? NO? Good, it's not supposed to make sense! It's in code! Which is why Jonny & 1st SFG shouldn't be able to make heads-nor-tails of whatever radio signal(s) they might be able to catch and quickly translate from Deutsch. Besides that, atmospheric skipping is an unreliable method of radio communitcation interceptions.
Additionally, the US military's 1970's-era "smaller" intra-squad/intra-platoon/intra-company backpack radios that I was most familiar with often don't have wavelengths & the carrying power to bounce off the ionisphere to be picked up thousands of miles away. Warsaw, Poland to Ft. Drum in the USA is something like 4,300 miles. The Germans are almost certainly as aware, if not more aware, of radio skip and the need to design their radio equipment to prevent it. Hell, even in the mid-70's, it still could be difficult to pick up, or get picked up by, radios sometimes only several miles apart ... maybe there's a ridge between this one & that one, or there's a radio signal "shadow" of some sort.
Just sayin'.
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