They were marooned on the island for seven months , before they managed to make their way to India on a sloop they built on the island .
She went down within 20 minutes , with only 23 of the 270 passengers and crew surviving .
passengers were marooned on the island for seven months , before passengers managed to make passengers ' way to India on a sloop they built on the island .
She went down within 20 minutes , with only 23 of the 270 passengers and crew surviving .