Navigation satellites long answers: please give answers fast. In don't have time.

1.) A satellite navigation or satnav system is a system that uses satellites to provide autonomous geo-spatial positioning.

2) It allows small electronic receivers to determine their location to high precision using time signals transmitted along a line of sight by radio from satellites.

3)A satellite navigation or satnav system is a way of pinpointing position very exactly.

4) Satnav uses a system of satellites. The system gives exact positioning.

5)The position is given within a few metres using time signals transmitted along a straight line (line of sight) by radio from satellites.

extra facts:

The signals also allow the electronic receivers to calculate the current local time to high precision, which allows time synchronisation. A satellite navigation system with global coverage may be called a global navigation satellite system (GNSS).