The FAA says that Spot satellite messengers cause interference with GPS signals. In other news, FAA grounds Tamarack active winglet-modded jets.

If you fly with a Spot portable satellite messenger, use caution when placing the device around GPS receivers and antennas. In an Information for Operators publication (InFO 19006, May 6, 2019) the FAA advises that it has been notified of "several instances of intermittent loss of GPS position information" when Spot messengers are used in the cabin. It also noted that the signal problem could also affect ADS-B systems. In the FAA InFO letter, the agency reiterated that it was aircraft operators who confirmed the use of Spot PED as the cause of the GPS interference.
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