Read this https://www.faasafety.gov/files/notices/2016/Jun/CHLK_16-08_GPS_Flight_Advisory.pdf Phil W7OX On 6/10/16 1:31 PM, John Huggins, kx4o wrote: > >http://www.thedrive.com/the-war-zone/3865/this-is-likely-why-the-navy-is- > >cau sing-a-massive-and-mysterious-gps-outage-in-the-western-us