CONTENTS:- 1. Five thousand years of adventure on sea. 2. Sources, methods and technology. 3. Discovery of submerged Dvaraka. 4. Antiquities from Dwarka and bet Dwarka. 5. Contribution of Dvaraka to the progress of civilization. 6. Discovery of Poompuhar submerged in the bay of Bengal. 7. Archaeology of ships. 8. Ancient ports of India.
The Indian subcontinent with its 6500 km long coastline, 200 ports and a rich hinterland connected by major rivers has played a vital role in the Indian Ocean trade by connecting the East and West throughout its 5000 year long history of shipping and maritime trade. It was a pioneer in ship and dockyard building even during the days of the Indus Valley (Harappa) civilization is proved by the discovery of a massive brick-built tidal dock with a warehouse at the Harappan port of Lothal in the Gulf of Cambay in 2300 BC. By 1600 B.C. it could provide docking facilities in the seaport of Dwarka by modifying a ridge suitably to anchor large ships in the harbour. Simultaneously with this advancement in nautical engineering the mariners of Dwarka could improve on the earlier stone anchors. "During the long history of shipping various nations of the world have lost thousands of ships and the sea has swallowed scores of ports as a result of cyclones, coastal erosion and sea level rise. Each ship lost and port submerged is an epitome of the society that built it, and is a treasure house of knowledge and therefore deserves to be discovered and preserve this heritage of man through systematic.