Studies in Ancient Hindu Polity (Based on the Arthashastra of Kautilya), Vol. I c9.s2.5

c9.s2.5

carrying on inter-portal communication. These were naturally more exposed to dangers than either the river routes or the land routes. Lastly, there were ocean routes (संयानपथ) carrying on the intercourse of India with foreign countries across the sea. The existence of definite ocean routes, clearly marked out, no doubt implies a high degree of development of the art of navigation.