VMS Help FORTRAN, Compatibility Features, Record Specifier Syntax  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  In Compaq Fortran, you can specify the following form for a record
  specifier:

     'r

     r  Is a numeric expression with a value that represents
        the position of the record to be accessed using direct
        access I/O.  The value must be greater than or equal to 1,
        and less than or equal to the maximum number of records
        allowed in the file. If necessary, a record number is
        converted to integer data type before being used.