<Tr> <Th> Tehsil </Th> <Td> Great Nicobar </Td> </Tr> <Tr> <Th> Elevation </Th> <Td> 47 m (154 ft) </Td> </Tr> <Tr> <Th_colspan="2"> Population (2011) </Th> </Tr> <Tr> <Th> Total </Th> <Td> 27 </Td> </Tr>

When was indira point submerged under sea water