/sys$common/syshlp/helplib.hlb FORTRAN, Format Specifiers, TR  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  TRn (Tab Right n Positions)

  Indicates that the next character to be transferred to or from a
  record is the "n"th character to the right of the current
  character.

  The value of "n" must be greater than or equal to 1.