Innacurate GPS positional information
Just in case you weren't aware of this...there does seem to have been an increase in reports reccently whereby the GPS trace is not very accurate:
Galileo sat-nav system still without service: https://www.bbc.co.uk/news/science-environment-48985399
Galileo sat-nav system still without service: https://www.bbc.co.uk/news/science-environment-48985399
Re: Innacurate GPS positional information