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4.2,2.2  Checking  voyage  plan
The  process  of  checking  the  voyage  plan  takes  into  account  the  three  components  “route”,  Track”  and
“speed/time  profile”.  Accordingly,  the  data  flow  “correction  information"  is  divided  into  three  flows  containing ­
  these  aspects.  Although  the  check  on  these  components  is  modelled  in  delimited  processes,
dependent  factors  should  be  considered,  since  the  data  for  route,  track  and  speed/time  profile  are  established ­
  on  one  another.  As  in  the  planning,  therefore,  care  should  also  be  taken  during  the  check  on
the  voyage  plan  to  ensure  consistency  of  the  data  used.

correction  information,  track

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DFD  1.2:  Task  “Checking  voyage  plan'