23

3.  Track  planning
3.1  Determining  local  peculiarities:  fine  planning  of  the  route,  including  regional
boundary  conditions,  e.g.  sea  marks,  traffic  separation  schemes,  speed  restrictions. ­
  This  functionality  includes  any  necessary  introduction  of  further  way  points.
3.2  Fixing  the  track,  i.e.  describing  planned  manoeuvres  at  course  changing  points  by
fixing  the  turning  radii  or  ROT  as  well  as  determining  rudder  setting  points  for
course  changes
3.3  Fixing  the  maximum  transverse  and  longitudinal  deviations  from  the  planned
track.
3.4  Determining  the  manoeuvring  limits:  maximum  ROT  and  maximum  rudder  position. ­

2.1.3  Functions
The  functionalities  of  the  task  “Drafting  the  voyage  plan”  are  of  the  “Data  recording"  type.  They  are  thus
composed  of  the  elementary  individual  functions  “Record  input  data”,  “Evaluate  data”  and  “Provide  set
values/information”.
Annex  7.1  contains  the  functionalities  identified  for  this  task  as  well  as  the  elementary  individual  functions ­
  with  their  input  and  output  data,  in  overview  form.
22  Checking  the  voyage  plan
The  term  “checking"  in  this  context  is  understood  to  mean  the  comparison  of  resultant  information  from
the  task  “Drafting  the  voyage  plan”  (see  2.1)  with  the  reference  values  (“limit  values”  or  “limits”),  which
are  produced  from  the  different  boundary  conditions.  In  the  analysis  of  this  task,  the  resultant  information ­
  from  the  task  “Drafting  the  voyage  plan”  should  be  assumed  as  a  starting  point.  This  supplies  the
following  information:
1.  Description  of  the  planned  route:  way  points,  set  courses  and  distances  between  the
way  points.
2.  Detailed  description  of  the  planned  track:  fixing  the  manoeuvre  at  course  changing
points  (turning  radius/ROT  as  well  as  wheel-over  points),  maximum  transverse  and
longitudinal  deviations.
3.  Speed/time  profile:  set  speeds  for  the  track  sections,  expected  passage  and  arrival
times  at  selected  way  points.
4.  Manoeuvring  limits:  maximum  ROT  and  maximum  rudder  position.

2.2.1  Purpose  of  task
As  already  stated  under  the  task  “Drafting  the  voyage  plan”,  a  distinction  may  be  made  between  checking ­
  the  route  and  checking  the  track.  The  aim  of  route  checking  is  to  establish  whether  the  planned
route  can  be  followed,  bearing  in  mind  the  characteristics  of  the  own  ship  as  well  as  of  the  meteorological ­
  and  hydrographic  boundary  conditions  expected.  In  this  case,  the  following  criteria  should  be  considered: ­