Technical question regarding interfering signals....

[Fomen]

So I have a technical question for you guys. Let me know if any of you have ever encountered this scenario.

My buddy and I both have Lowrance Chirp sonars on our kayaks. I have an older Elite4x Chirp and he has a brand new Hook4. If we are paddling within several feet of each other, and we are both running the chirp (or even just the sonar) functions on the FF's, will the signals interfere with each other? Will the tracking display for the bottom contours get distorted because the systems are confusing each others signals? If so, how close can you be to similar units without this happening? I realize it's not a huge deal, and we can probably just stay 20' apart or so. I'm just curious if anyone on here has ever experienced anything like this. Thanks guys....