Functionality  level  1

Functionality  level  2

Function

Input  information

Output  information

2.2.3  Assess  result  of
comparison

•  Result  information  from  2.2.2
•  Consistency  criteria

•  Is  a  determined  value  usable?

2.2.4  Selection  of  data  to
be  provided

•  Result  information  from  2.2.1
•  Result  information  from  2.2.3

•  ROT

2.2.5  Provision  of  data

•  Result  information  from  2.2.4

•  Representation  of  selected  value  for  the  navigator
•  Display  if  measured  values  inconsistent
•  Provision  of  selected  value  for  further  processing

2.3  Determine  speed
over  ground

2.3.1  Provide  data  and
criteria

•  See  Table  3

•  Different  SOG x

2.3.2  Compare  data  and
criteria

•  Result  information  from  2.3.1
•  Accuracy  of  all  input  variables
•  Consistency  of  all  input  variables
•  Plausibility  criteria

•  Statement  concerning  the  consistency  and  plausibility ­
  of  the  measured  values

2.3.3  Assess  result  of
comparison

•  Result  information  from  2.3.2
•  Consistency  criteria

•  Isa  determined  value  usable?

2.3.4  Selection  of  data  to
be  provided

•  Result  information  from  2.3.1
•  Result  information  from  2.3.3

•  SOGx

2.3.5  Provision  of  data

•  Result  information  from  2.3.4

•  Representation  of  selected  value  for  the  navigator
•  Display  if  measured  values  inconsistent
•  Provision  of  selected  value  for  further  processing

2.4  Determine  speed
through  water

2.4.1  Provide  data  and
criteria

•  See  Table  3

•  Different  STW X

2.4.2  Compare  data  and
criteria

•  Result  information  from  2.4.1
•  Accuracy  of  all  input  variables
•  Consistency  of  all  input  variables
•  Plausibility  criteria

•  Statement  concerning  the  consistency  and  plausibility ­
  of  the  measured  values

2.4.3  Assess  result  of
comparison

•  Result  information  from  2.4.2
•  Consistency  criteria

•  Is  a  determined  value  usable?

2.4.4  Selection  of  data  to
be  provided

•  Result  information  from  2.4.1
•  Result  information  from  2.4.3

•  STWx