By locking onto a fourth satellite, the GPS can compute a 3D (three-dimensional) fix, calculating your altitude as well as your latitude/longitude position. In order to do this Lowrance uses a 12 parallel-channel receiver in all of its current products. Three of the channels lock on to satellites for triangulation.

Is Lowrance GPS accurate?

* Cartography (Map Data): Lowrance Electronics obtains its mapping data from government agencies. ... A unit's GPS position (Latitude/Longitude) can be extremely accurate, but the location of a cartographic item such as a street, highway, or point-of-interest may be slightly inaccurate.

What mapping does Lowrance use?

C-MAP Genesis Custom Mapping

The C-MAP Genesis Social Map is a free, global, online presentation of inland and coastal data generated by the Lowrance, Simrad Yachting and B&G communities of fishing, cruising, and sailing enthusiasts.