Global positioning system and Navigational system

Global positioning system noun - A navigational system involving satellites and computers that can determine the latitude and longitude of a receiver on Earth by computing the time difference for signals from different satellites to reach the receiver.

Navigational system and global positioning system are semantically related. In some cases you can use "Navigational system" instead a noun phrase "Global positioning system".

Navigational system noun - A system that provides information useful in determining the position and course of a ship or aircraft.

Global positioning system and navigational system are semantically related. Sometimes you can replace phrase "Global positioning system" with "Navigational system", this phrases are similar.