VMS Help PASCAL, Input Output, Direct Access  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Direct access procedures  are  generally  legal  only  on  files
  opened  for  direct  access.  In some cases, procedures apply to
  keyed access files as well.

  Additional Information (explode) :

• DELETE
• FIND
• LOCATE
• UPDATE