Library /sys$common/syshlp/anlrmshlp.hlb POSITION, /RECORD  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Positions the pointer at a specific record in an indexed or relative
 file.

    Format

      POSITION/RECORD  record-offset

    The offset (in bytes) from the beginning of the bucket to the
    desired record. By default, the offset is a decimal number. If
    you want to use hexadecimal notation to specify the offset, use
    the format %Xn.