Particularly Vulnerable Tribal Group (PVTG) of the islands. (Answer in 150 words)

- Particularly Vulnerable Tribal Group (PVTG) of the islands. (Answer in 150 words)
Introduction
Five of India's Particularly Vulnerable Tribal Groups are island peoples of the Andaman and Nicobar Islands, including the country's only communities living without settled contact.

Body
1. Who they are: the Great Andamanese, Onge, Jarawa and Sentinelese, all Andamanese hunter-gatherers and fishers, and the Shompen of Great Nicobar, semi-nomadic foragers dependent on pandanus. The Nicobarese are a Scheduled Tribe but not a vulnerable group.
2. Demography and contact: the Great Andamanese fell from several thousand in the nineteenth century to about fifty on Strait Island. The Onge number about a hundred, the Jarawa five to six hundred and in contact only since 1997, when measles outbreaks followed. The Sentinelese are uncontacted and the Shompen number a few hundred.
3. Administration: the 1956 Aboriginal Tribes Regulation and the tribal reserves, the Supreme Court's orders on the Andaman Trunk Road, the ban on human safaris, and an eyes-on, hands-off policy of no forced contact.

Conclusion
The Great Nicobar transhipment port and township now proposed puts the Shompen habitat directly at issue, and is the sharpest current test of that policy.