1. Travel or traffic by ship, particularly commercial shipping: There is a lot of navigation in and out of Bremerhaven or Hamburg to different foreign countries.
2. The charting of a course for a road vehicle, an aircraft, vessel, or spacecraft: There is a lot of theory, practice, and technology involved in the night navigation of yachts or other sea-going boats.

Movements by means of the observations made of the apparent positions of heavenly bodies.

1. The use of electronic aids to determine the position and to direct the course of a craft; such as, aircraft or water craft.
2. Navigation by means of any electronic device or instrument.
3. A means of determining a geographical position using electronic instruments, principally satellite navigation equipment.

Galileo System.

GLONASS.