Gps and Navigational system

Gps 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 gps are semantically related. In some cases you can use "Navigational system" instead a noun "Gps".

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

Gps and navigational system are semantically related. Sometimes you can replace term "Gps" with "Navigational system", this terms are similar.