July 5, 2010 13:21
When I was at anchor the first night, I checked my position using the Navionics app on my iPhone, and it correctly identified my position. There was no Wi-Fi in that anchorage, but there was good cell coverage.
I assumed that if Location Services was providing a position it would use either GPS data, or cell tower triangulation data, or some combination. If no cell tower triangulation data was available (as in my case on the iPad, because I had not yet signed up for a cell data plan with Rogers here in Canada), then I assumed the position of the iPad would be determined by its on-board GPS.
Since, to my knowledge, I had no Wi-Fi connection at the dock before I left, AND no cellular plan, yet the iPad's position was properly plotted on the relevant CHS chart in iNavX, then I thought that would be confirmation that the GPS was functional.
Does Location Servives rely on the iPad being within range of land?
I assumed that if Location Services was providing a position it would use either GPS data, or cell tower triangulation data, or some combination. If no cell tower triangulation data was available (as in my case on the iPad, because I had not yet signed up for a cell data plan with Rogers here in Canada), then I assumed the position of the iPad would be determined by its on-board GPS.
Since, to my knowledge, I had no Wi-Fi connection at the dock before I left, AND no cellular plan, yet the iPad's position was properly plotted on the relevant CHS chart in iNavX, then I thought that would be confirmation that the GPS was functional.
Does Location Servives rely on the iPad being within range of land?