VMS Help FORTRAN, Statements, INQUIRE, UNFORMATTED  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  UNFORMATTED = unf

  unf  Is a character scalar memory reference that is
       assigned one of the following values:

  'YES'       If unformatted I/O is allowed for the
              specified file
  'NO'        If unformatted I/O is not allowed
  'UNKNOWN'   If the form cannot be determined