Go into location services, see what you find.
On our tablet one can elect wifi
location / 3G location / GPS location or any combo of the above.
Available location method is then elected by the software
This would be interesting (and a bit odd) if marine navigation
software were using wifi or 3/4G location as default, without clearly telling the user this is the case.
Unfortunately, i-Services (like AIS
via wifi/3G) much as they are useful, added a layer of misunderstanding as to what is available, when, and what the consequences are.