VMS Help PASCAL, Attributes, UNSAFE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  The UNSAFE attribute indicates that an object can accept  values
  of  any  type without type checking.  The exact properties of an
  unsafe object depend on the object's machine representation.

  See the  "Compaq  Pascal  Language  Reference  Manual"  for  the
  complete description of using the UNSAFE attribute.