Step 1: Concept
The history of human navigation tracks the evolution of tools from pure visual observation to modern satellite positioning.
Step 2: Meaning
Before the invention of navigational instruments like the compass or sextant, travelers relied entirely on the physical environment to guide them.
Step 3: Analysis
• Modern navigation uses GPS and electronic charts.
• The age of exploration utilized celestial navigation and magnetic compasses.
• In the ancient (or early/prehistoric) age, navigation was purely a visual process relying on distinct physical features of the landscape, such as mountains, rivers, or prominent rocks, known as landmarks.
Step 4: Conclusion
Therefore, it was the ancient age when navigation was strictly limited to recognizing physical landmarks.
Final Answer: ancient