What is meant by the term terrestrial navigation?

Question

Question PPL(A) - Private Pilot License - Navigation

QuizVDS · Accepted Answer

Orientation by ground features during visual flight

QuizVDS · Answer

Orientation by ground celestial object during visual flight

QuizVDS · Answer

Orientation by GPS during visual flight

QuizVDS · Answer

Orientation by instrument readings during visual flight

Id 136 - PPL(A) EN - What is meant by the term "terrestrial navigation"?