You may wish to review your GPS equipment due to the upcoming April 6 2019 GPS Week Rollover Issue that may affect older GPS units.
Further info can be found on these links or simply Google “April 6 GPS”
https://www.gps.gov/cgsic/meetings/2017/powers.pdf
https://www.schriever.af.mil/News/Article-Display/Article/1776011/gps-week-number-to-rollover/
Further info can be found on these links or simply Google “April 6 GPS”
https://www.gps.gov/cgsic/meetings/2017/powers.pdf
https://www.schriever.af.mil/News/Article-Display/Article/1776011/gps-week-number-to-rollover/