17 
Tasks 
Among the five above-mentioned task areas, the tasks of integrated navigation can be classified as 
follows (Figure 1): 
Integrated navigation 
Process task 
1 vtoyage planning 
2 'vOyage execution 
3 Management of 
data end reference 
4 Unplanned 
incidents 
5 Recording the 
current situation 
; 
parameters 
‘—1.1 Drafting of 
|— 2.' Determine s©*/ 
actual devtafiara 
■—4.1 CcHtoon avoidance 
voyage plan 
’— 1.2 Check 
3,1 Management a? 
I 
! 
2.2 Determine set 
vessel parameters 
— 4.2 SroundinQ cMxicnce 
voyage purs 
— 1 .2 AC3fW<te*&r 
voyage pier. 
Vtsues 
— 3.2 Management of geo 
gfophica date 
— 4.3 Evasion of Pad weathsr 
regions 
3.3 Management of navi- 
— 4.4 Mcn-overtK3ara 
manoeuvres 
Task areas 
~5.t Stas® ¡aeiiifteanoft 
-3.2 Ccservng current enwenment 
situation 
-5.3 Cfcject recording 
Tasks 
Figure 1: Process tasks, task areas and tasks of navigational operation 
Figure 1 shows the three upper levels of the analysis of integrated navigation. From the global process 
task are derived task areas, to which can in turn be allocated tasks. The global process task Is thus 
fulfilled by the execution of the tasks represented here. The function catalogue contained in the annex 
is structured according to the tasks represented here. 
Functionalities 
Functionalities represent closed functional units which have to be executed to fulfil a task. They process 
a set of input data and supply a defined set of output information. Depending on the complexity of the 
task considered, functionalities may be structured in several levels, i.e. a complete functionality with a 
high degree of abstraction can be described by a quantity of functionalities with a lower degree of ab 
straction. This process of sub-division is carried out recursively until the level of functions (see below) is 
reached. Figure 2 shows the task areas, tasks and functionalities identified in this report, in summary 
form. 
Functions 
The purpose of this report is to identify the elementary individual functions (or “functions” for short) for 
each functionality of the lowest level (see above). Moreover the respective functionality is implemented 
by the combination of several elementary individual functions. 
Within the framework of the analysis, various types of functionality were identified, which can be imple 
mented by a certain set of functions. The following types may be distinguished: 
• Functionalities for data recording 
• Functionalities for selection of system data 
• Functionalities for the set/actual comparison 
• Functionalities for influencing state variables