SÃ # o TomÃ is important as a port . It is located on Ana Chaves Bay in the north east of SÃ # o TomÃ Island . Important as a port , SÃ # o TomÃ is located on Ana Chaves Bay in the northeast of SÃ # o TomÃ Island , and IlhÃ u das Cabras lies nearby offshore .