Thanks, I appreciate the info, I was more concerned that changes in the earths parameters (axis, rotation, etc..) would cause a loss in our navigation capabilities and of course more important disasters may follow(increase in natural events. I'm aware the magnetic spots through the chart and was thinking that anytime you make a major shift to a big axis, your readings will adjust as well. Kinda of like putting a magnet on a table and looking at a reading on your compass and then move the magnet and of course the compass follows suit. One thing I'm not realizing is that this may occur over years and not something that will happen in days, so I'm not in a region on travel and wake up in the morning and wonder why my compass is pointing a complete direction than I had traveled the day before. I guess if this happens there are a lot more problems to worry about than this. Thanks for the input.