Maritime History of India - Prehistory

Prehistory

The region around the Indus river began to show visible increase in both the length and the frequency of maritime voyages by 3000 BCE. Optimum conditions for viable long-distance voyages existed in this region by 2900 BCE. Mesopotamian inscriptions indicate that Indian traders from the Indus valley—carrying copper, hardwoods, ivory, pearls, carnelian, and gold—were active in Mesopotamia during the reign of Sargon of Akkad (c. 2300 BCE). Gosch & Stearns write on the Indus Valley's pre-modern maritime travel: Evidence exists that Harrappans were bulk shipping timber and special woods to Sumeria on ships and luxury items such as lapis lazuli. The trade in lapis lazuli was carried out from northern Afghanistan over eastern Iran to Sumeria but during the Mature Harrappan period an Indus colony was established at Shortugai in Central Asia near the Badakshan mines and the lapis stones were brought overland to Lothal in Gujarat and shipped to Oman, Bahrain and Mesopotamia.

The world's first dock at Lothal (2400 BCE) was located away from the main current to avoid deposition of silt. Modern oceanographers have observed that the Harappans must have possessed great knowledge relating to tides in order to build such a dock on the ever-shifting course of the Sabarmati, as well as exemplary hydrography and maritime engineering. This was the earliest known dock found in the world, equipped to berth and service ships. It is speculated that Lothal engineers studied tidal movements, and their effects on brick-built structures, since the walls are of kiln-burnt bricks. This knowledge also enabled them to select Lothal's location in the first place, as the Gulf of Khambhat has the highest tidal amplitude and ships can be sluiced through flow tides in the river estuary. The engineers built a trapezoidal structure, with north-south arms of average 21.8 metres (71.5 ft), and east-west arms of 37 metres (121 ft).