With reference to the period of Gupta dynasty in ancient India, the towns Ghantasala, Kadura and Cha

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With reference to the period of Gupta dynasty in ancient India, the towns Ghantasala, Kadura and Chaul were well known as

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Indian examples of Ancient submerged Port Towns: In India, evidences of ship building, port, and warehouse installations are datable to Harappan culture. The important Harappan and late Harappan ports were:LothalLakhabawalKindarkheraKuntasiMeghamPrabhasaTodioAmraThe excavations of these sites have yielded antiquities of Bahrain island, Persian Gulf, Egypt, and Mesopotamia cities. The same maritime traditions continued even during the lifetime of Buddha, the Mauryas, the Gupta, and in later periods. During the historical period, India had trade and cultural contacts with Egypt, Rome, Greeks, Arabs, China, and almost all Southeast Asian countries through these ports.The ports on the west coast were:BarygayaSupparaCallienaSemyllaMandagorePalaepatmeMalizigaraAurranobbasByzantineNauraTyndisMuzirisNelcyndaAnd the ports on the east coast were:TamraliptiCharitrapurPaluruDantapurKalingapatnamPithundaSopatmaGhantasalaPoducaPuharKorkaiCamaraMerchants thronged sea-port towns like Mamallapuram, Puhar, and Korkai; or busy customs officials, and those engaged in loading and unloading vessels in the harbor. The wealth of the Roman Empire reached India through the ports of Kalyan, Chaul, Broach, and Cambay in Western India. Tamralipti was an important port in Bengal. It carried on trade with China, Lanka, Java, and Sumatra. In the Andhra region, the ports were Kadura and Ghantasala, Kaveripattanam (Puhar) and Tondail were the ports of the Pandya region. The ports of Kottayam and Muziris were on the Malabar coast. There was a great maritime trade between India and Southeast Asia and China.Source Citation: OLD NCERT: Medieval India Satish Chandra, The Hindu, NOAA Marine Archive