The
Onge, one of the other indigenous peoples of the
Andamans, were aware of North Sentinel Island's existence; their traditional name for the island is
Chia daaKwokweyeh. Homfray, an administrator, travelled to the island in March 1867. Towards the end of the same year's summer monsoon season,
Nineveh, an Indian merchant ship, was wrecked on a reef near the island. The 106 surviving passengers and crewmen landed on the beach in the ship's boat and fended off attacks by the Sentinelese. They were eventually found by a
Royal Navy rescue party. The Sentinelese are known to have scavenged both shipwrecks for iron. Settlers from
Port Blair also visited the sites to recover the cargo. In 1991, salvage operators were authorised to dismantle the ships.
First peaceful contact and members of the contact expedition team interacting with the Sentinelese people by offering coconuts The first peaceful contact with the Sentinelese was made by
Triloknath Pandit, a director of the
Anthropological Survey of India (AnSI), and his colleagues on 4 January 1991. Among the team was
Madhumala Chattopadhyay, the first female anthropologist to make contact with the tribe. During the encounter, Chattopadhyay called out to the islanders using tribal words she had learned from other Andamanese groups, inviting them to collect the coconuts. Although a young tribesman initially aimed a bow at the researchers, he lowered his weapon after being nudged by a woman on the shore, and the islanders began accepting coconuts directly from the researchers. On these gift dropping missions, he and his team exchanged bananas and coconuts with the Sentinelese people. Despite having no common language the groups communicated and planted coconut saplings together. The expeditions stopped due to ethical concerns for the cultural and physical well being of the tribespeople, as well as changes in Indian government policies.
Indian Ocean earthquake and later hostile contacts The Sentinelese survived the
2004 Indian Ocean earthquake and its after-effects, including the
tsunami and the uplifting of the island. Three days after the earthquake, an Indian government helicopter observed several islanders, who shot arrows and threw spears and stones at the helicopter. Although the tsunami disturbed the tribal fishing grounds, the Sentinelese appear to have adapted. In November 2018, a 26-year-old American
Christian missionary named
John Allen Chau, who was trained and sent by
Missouri-based All Nations, was killed during an illegal trip to the restricted island where he planned to preach Christianity to the Sentinelese. The 2023 documentary film
The Mission discusses the incident. Seven individuals were taken into custody by Indian police on suspicion of abetting Chau's illegal access to the island. Despite efforts by Indian authorities, which involved a tense encounter with the tribe, Chau's body was not recovered. In December 2022, three fishermen were found missing after a fishing trip. Their boat has been spotted on North Sentinel Island by the local fishermen and the A&N administration, leading to the possibility of them either being stranded on the island or killed by the “Sentinelese” tribe. In March 2025, another
US citizen made an unauthorised landing on the island. He illegally left behind
Diet Coke and
coconuts, collected sand samples and recorded a video before returning. He was subsequently arrested by the
Indian Police Service and presented before the local court. Following his arrest, he referred to himself as a "thrill seeker". Police have claimed that he attempted to conduct reconnaissance of North Sentinel Island in October 2024, and that he had explored other archipelago islands in January 2025 where he illegally recorded video footage of members of the protected
Jarawa tribe. ==Geography==