These pages often contain encouragement to pilots not to become so completely reliant on GPS that its loss constitutes no less than an emergency. GPS, both panel-mount and portable, can fail for external and internal reasons. Read about these GPS-failure events culled from ASRS reports. We hope this article will lead you to get some practice using terrestrial nav. An ATP ferry pilot was repositioning a series of aircraft between Flying Cloud and South St. Paul Municipal airports near Minneapolis. He experienced momentary-but total-GPS outages on every flight over one area. Circumnavigating south of MSP's Class B airspace below the Class B shelf at 2000 feet, the outages occurred in the area depicted in red, below. All units affected were Garmin GTN 730s but one, a GNS 530. This unit didn't lose signal but showed an error message briefly.
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