Do you really want to see how a magnetic pole shift will affect you. Alright, stand facing north. Now look at your phone, now turn so that your facing south. Congratulation you just flipped the magnetic field in relation to your phone. It will affect magnetic compasses, so animal migration will be effected, but you and I don't migrate that way. as for aircraft and ship traffic, they use a magnetic compass as backup to a gyro compass which has to be calibrated. I know on board ships the gyro is calibrated using celestial navigation, not the magnetic compass because the magnetic compass can be thrown off by someone standing close to it with a set of keys in their pocket. or a wrench, or any large ferrous metal object.