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@disq
Yes, the processor in the camera generates some noise ("harmonics" is the term I think) in the GPS band so that it affects GPS. To remedy this I keep a "GPS Accuracy" field in one of my screens on Wahoo, and I turn on the camera after the fix is acquired. If the cam is recording/noise is there from the beginning, the unit can't lock on to GPS. After the fix is acquired, the accuracy drops a little when the cam is on, but it's rarely lost. (I used to have a Mobius camera under my Wahoo, now I use a Fly12CE, not as bad, but essentially the same thing)