This app was mentioned in 5 comments, with an average of 1.40 upvotes
I use this android app which tells you which glonass, GPS, Galileo, or Beidou GPS Sat's you're using. I assume there's an equivalent iPhone app.
I can recommend GPS Test Plus and GPS Status & Toolbox - long time user.
If you have an Android phone, I recommend using GPS Test Plus. Install the app, go to the 3-dot menu at the top-right. Select "Clear AGPS." Then go to the 3-dot menu again and select "Update AGPS." This fixed my GPS issues, and I had the same exact issue.
If you have an Android phone, I recommend using GPS Test Plus. Install the app, go to the 3-dot menu at the top-right. Select "Clear AGPS." Then go to the 3-dot menu again and select "Update AGPS." This fixed my GPS issues, and I had the same exact issue.
GPS test plus. It does lat/lon and does not need data.
https://play.google.com/store/apps/details?id=com.chartcross.gpstestplus
Navonics can cache the area your going into.