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•  Record  information
•  Assess  information
•  Act

The  function  “Record  information”  may  be  implemented  several  times  for  one  functionality  in  this  instance. ­
  Thus  it  is  the  case  in  automatic  track  following,  for  example,  that  the  input  set/actual  difference
for  a  track  is  compared  with  an  “off-track  limit”  in  order  to  derive  from  the  comparison  the  permissibility
of  the  manoeuvre  to  be  executed  automatically.  In  this  case,  two  functions  of  the  “Record  information"
type  would  have  to  be  implemented  for  the  purpose  of  recording  the  set/actual  deviation  and  limit.
Moreover,  a  function  of  the  “Assess  information”  type  must  be  provided  in  order  to  test  the  permissibility
of  the  manoeuvre  being  carried  out.