In these anecdotal reports, I'd like to see whether or not the actual navigation devices have been tested. In my opinion and past experience, it's possible that

In these anecdotal reports, I'd like to see whether or not the actual navigation devices have been tested. In my opinion and past experience, it's possible that there actually is interference, but it's very like it's a result of a faulty/fragile board or bad shielding. In that case, it would seem like the prudent thing to do is to verify that it's not the actual device that is faulty/fragile, and routine testing of essential navigation devices should be as important as checking the engine.