Torpedo Jar Fragment
Why in News?
- A torpedo jar fragment along with ancient terracotta ring wells were recently discovered underwater off the Poompuhar coast in the Mayiladuthurai district of Tamil Nadu.
- The discovery was made by the Tamil Nadu State Department of Archaeology (TNSDA) during the third phase of an underwater exploration campaign that concluded on September 22, 2026.
What is a Torpedo Jar?
- Design & Purpose: A torpedo jar is a tubular, thick-walled ceramic vessel featuring a narrow neck and a cylindrical body. Its specific torpedo-like shape was engineered to prevent liquids from spilling during rough voyages on cargo ships.
- Usage: They were primarily used to transport high-value liquid commodities such as wine, olive oil, and perfumes.
- Internal Coating: Historically, these jars were lined with bitumen (a natural tar-like substance) on the inside to make them completely waterproof and protect the liquids from leaking through the porous clay.
- Origin (Provenance): They are closely linked to West Asian, Persian Gulf, and Mesopotamian manufacturing hubs, particularly active during the Parthian, Sasanian, and early Islamic periods.
Key Details of the Recent Findings
- The Fragment: The recovered piece is composed of a fine variety of ceramic. Based on its arc, archaeologists estimate the complete jar originally had a diameter of 30 cm to 35 cm.
- Location & Depth: The fragment was found 2 kilometres away from the modern coastline at a depth of 10 metres in the Bay of Bengal.
- The Ring Wells: Four intact terracotta ring wells (diameters ranging between 60 cm and 65 cm) were discovered on the ocean floor. Because ring wells are freshwater structures built on land, their presence strongly confirms a palaeochannel (an ancient, buried riverbed) once flowed here.
- Massive Ceramic Collection: Over 250 ceramic pieces, including West Asian glazed ware and paddle-impressed pottery from the Gangetic plains, were recovered across a two-square-kilometre survey zone.
- Parallel Sites: While this is the first underwater find, similar terrestrial torpedo jar fragments have been excavated at Sangam-era sites in Tamil Nadu, such as Alagankulam, Korkai, Porpanaikottai, and Vembakottai.
Historical Significance
- Corroborating Tamil Epics: Ancient Tamil epics like Silappatikaram describe Poompuhar as a grand, bustling port city that was eventually swallowed by a catastrophic sea deluge. These underwater discoveries provide physical proof supporting those literary accounts.
- Diverse Trade Ecosystem: It underscores that ancient Tamil port cities did not just interact with the Roman/Mediterranean sphere (evident from previously found Roman amphorae jars) but maintained robust, sustained commercial ties with West Asian economies.
