Île Sud Talpatti

New Moore, also known as South Talpatti (Dokkhin Talpotti) and Purbasha Island (পূর্বাশা দ্বীপ), was a small uninhabited offshore sandbar island in the Bay of Bengal, off the coast of the Ganges-Brahmaputra delta region. It emerged in the Bay of Bengal in the aftermath of the Bhola cyclone in November 1970, and disappeared around March 2010. Although the island was uninhabited and there were no permanent settlements or stations located on it, both India and Bangladesh claimed sovereignty over it because of speculation over the existence of oil and natural gas in the region. The issue of sovereignty was also a part of the larger dispute over the Radcliffe Award methodology of settling the maritime boundary between the two nations. The matter was resolved on 7 July 2014, when the Permanent Court of Arbitration (PCA) delivered a verdict in the "Bay of Bengal maritime boundary arbitration between Bangladesh and India" case. The island was only from the mouth of the Hariabhanga River. The emergence of the island was discovered by an American satellite in 1974 that showed it to have an area of . Later, various remote sensing surveys showed that the island had expanded gradually to an area of about at low tide, including a number of ordinarily submerged shoals. The highest elevation of the island never exceeded above sea level. The island was located in the coastal, shallow Bay of Bengal immediately south of the international border river, the Hariabhanga, flowing between Satkhira district of Bangladesh and the South 24 Parganas district of West Bengal, India, at 21°37′00′′N 89°08′30′′E. It is now under the waves of the Bay of Bengal. The island was claimed by both Bangladesh and India, although neither country established any permanent settlement there because of the island's geological instability based on silt deposits in a delta which floods every year. India had reportedly hoisted the Indian flag on the island in 1981 and established a temporary base of Border Security Forces (BSF), regularly visiting with naval gunships.