T.N. launches third phase of underwater archaeological survey off Poompuhar coast

1. At a Glance

• Tamil Nadu State Department of Archaeology (TNSDA) began the third phase of underwater archaeological exploration off Poompuhar (ancient Kaveripoompattinam) in Mayiladuthurai district on Sunday, 6 Sept 2026 [1].
• Goal: trace maritime trade links of ancient Tamils, uncovering submerged structures of a Sangam-era port city [1][2].
• High UPSC relevance: intersects Art & Culture (GS-I), ASI/marine archaeology institutions (GS-I/III), and coastal heritage governance.
• Poompuhar is a recurring Prelims/Mains reference point — Sangam literature, Chola-era port, submergence due to sea-level/tidal change.

2. Why in the News

• TNSDA commenced Phase 3 of the underwater exploration off Poompuhar on Sunday, 6 September 2026, launched by Minister Rajmohan (School Education + Archaeology portfolio) along with Director of Archaeology V.P. Jayaseelan [1].
• Exploration planned for ~20 days, timed considering ocean current patterns and the Northeast monsoon [1].
• Previous (second) survey phase was conducted in September 2025 [1].

3. Background & Evolution

• Poompuhar, also called Kaveripoompattinam/Puhar, was a major Chola/Sangam-era port at the mouth of the Cauvery River, Coromandel Coast [2].
• Believed to have been a thriving trade hub over 2,500 years ago, referenced in Sangam literature and the Periplus of the Erythraean Sea; submerged owing to tidal/coastal action [2].
• Marine Archaeological Museum, Poompuhar established in 1997 [2].
• ASI's Underwater Archaeology Wing (UAW) established in 2001, active in Arabian Sea and Bay of Bengal explorations, ship-wreck documentation, and diver training [2].
• Current TNSDA-led effort represents state-level continuation, with Phase 1 and Phase 2 (Sept 2025) preceding this Phase 3 (Sept 2026) [1].

4. Core Static Facts

Item	Detail
Implementing body	Tamil Nadu State Department of Archaeology (TNSDA) [1]
Related central body	ASI Underwater Archaeology Wing (est. 2001) [2]
Site	Off Poompuhar coast, Mayiladuthurai district, Tamil Nadu
Ancient name	Kaveripoompattinam / Puhar [2]
District	Mayiladuthurai
Survey duration	~20 days [1]
Depth explored	Dived to 10 metres, ~2 km into the sea [1]
Key officials	Minister Rajmohan; Director of Archaeology V.P. Jayaseelan; archaeologist K. Rajan; former Joint Director R. Sivanantham; Joint Director (in-charge) V.P. Yathees Kumar [1]
Museum	Marine Archaeological Museum, Poompuhar (1997) [2]
Last phase	September 2025 [1]
Historical mention	Periplus of the Erythraean Sea; Sangam literature [2]

5. Multi-Dimensional Analysis

• Historical: Poompuhar's submergence is cited as physical evidence of ancient Tamil maritime trade networks with Southeast Asia and Rome-era trade routes [2].
• Scientific/Technological: Surveys use side-scan sonar, sub-bottom profilers, multibeam scanners, and ROVs to map the sea floor [2].
• Administrative: Illustrates state (TNSDA) vs central (ASI) division of labour in underwater heritage protection; timing planned around monsoon and ocean-current windows for diver safety [1].
• Cultural/Social: Reinforces Dravidian/Tamil identity narratives tied to ancient port-city civilization; feeds into heritage tourism (Marine Archaeological Museum).
• Geopolitical/Strategic (soft): Findings could reshape understanding of ancient Indo-Southeast Asian maritime trade linkages [2].

6. Recent Developments (last 12–18 months)

• September 2025: Second phase of underwater survey off Poompuhar conducted [1].
• 6 September 2026: Third phase launched by Minister Rajmohan and team, including a dive to 10m depth ~2 km offshore [1].

7. Prelims Hooks

• Poompuhar's ancient name is Kaveripoompattinam (also Puhar) [2].
• Poompuhar lies in Mayiladuthurai district, Tamil Nadu, on the Coromandel Coast at the mouth of the Cauvery River [2].
• The Marine Archaeological Museum, Poompuhar was established in 1997 [2].
• ASI's Underwater Archaeology Wing was set up in 2001 [2].
• Third phase of TNSDA's underwater survey launched on 6 September 2026 [1].
• Second (previous) phase of the survey was conducted in September 2025 [1].
• The Phase 3 survey was planned for approximately 20 days [1].
• Divers reached a depth of 10 metres, about 2 km from shore [1].
• The implementing agency is the Tamil Nadu State Department of Archaeology (TNSDA), not ASI directly [1].
• Ancient Poompuhar finds mention in the Periplus of the Erythraean Sea [2].
• Minister Rajmohan holds both the School Education and Archaeology portfolios in Tamil Nadu [1].
• V.P. Jayaseelan is the Director of Archaeology, TNSDA [1].

8. Mains Relevance

• GS-I: Indian Culture — "Salient aspects of Art Forms, Literature and Architecture from ancient to modern times"; maritime history of ancient India.
• GS-III: Science & Technology applications — use of sonar/ROV technology in archaeology; also links to coastal/ocean governance.
• Possible question stems: 1. Discuss the significance of underwater archaeological explorations in reconstructing India's ancient maritime trade history, with reference to Poompuhar. (GS-I) 2. Examine the institutional mechanisms for underwater cultural heritage protection in India, highlighting the roles of ASI and state archaeology departments. (GS-I/GS-II) 3. What technological advancements have enabled modern underwater archaeology? Discuss with examples from Indian coastal exploration. (GS-III)

9. Related Topics to Study Next

• ASI's Underwater Archaeology Wing — parent central institution for marine heritage protection.
• Sangam Age port cities (Muziris, Arikamedu, Korkai) — comparative ancient trade hubs.
• Periplus of the Erythraean Sea — key ancient text on Indian Ocean trade.
• Marine Archaeological Museum, Poompuhar — associated heritage institution.
• Keeladi excavations, Tamil Nadu — parallel TNSDA-led archaeological project generating similar UPSC interest.
• India's Coastal Regulation Zone (CRZ) and marine heritage law — legal framework touching coastal archaeological sites.
• Indian Ocean maritime trade with Southeast Asia (Chola naval expeditions) — geopolitical/historical linkage.

10. Common Errors / Trap Areas

• Confusing TNSDA (state-level, conducting this survey) with ASI's Underwater Archaeology Wing (central body) — they are distinct actors [1][2].
• Misdating: this is the third phase (2026); second phase was 2025, not to be confused with the current one.
• Conflating Poompuhar with other ancient ports like Muziris or Arikamedu — each is geographically and historically distinct.
• Assuming the Marine Archaeological Museum was built recently — it dates to 1997, well before this current survey.
• Misattributing the ministerial portfolio — Rajmohan holds School Education and Archaeology, not a dedicated Culture ministry role.