Section 7,11: Record_Specifier_Syntax

 In DEC 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.