# UBX
## Terminology
**Solution**: In GNSS documentation, a "solution" generally means the receiver's computed navigation state,
that is the answer the GPS receiver has computed from all its satellite measurements.
**DOP**: Dilution Of Precision.
**LLH**: Longitude, Latitude, Height.
**NED**: North East Down.
**SBAS**: Satellite Based Augmentation Systems.
**SV**: Space Vehicle.
## UBX-NAV
Navigation Results Messages: i.e. Position, Speed, Time, Acceleration, Heading, DOP, SVs used.
Messages in the NAV class are used to output navigation data such as position, altitude and
velocity in a number of formats.
Additionally, status flags and accuracy figures are output.
The messages are generated with the configured navigation/measurement rate.
## UBX-NAV-SOL
This message has only been retained for backwards compatibility; users are recommended to use the UBX-NAV-PVT message in preference.
## UBX-NAV-SVINFO
This message has only been retained for backwards compatibility; users are recommended to use the UBX-NAV-SAT message in preference.