Functionality leve! 1 
Functionality level 2 
Function 
Input information 
Output information 
1.7.2 Compare data and 
criteria 
• Result information from 1.7.1 
• Accuracy of all input variables 
• Plausibility criteria 
• Statement concerning the consistency and plausi 
bility of the measured values 
1.7.3 Assess result of 
comparison 
• Result information from 1.7.2 
• Consistency criteria 
• Is a measured value usable? 
1.7.4 Selection of data to 
be provided 
• Result information from 1.7.1 
• Result information from 1.7.3 
. DEPTH* 
1.7.5 Provision of data 
• Result information from 1.7.4 
• Representation of the selected measured value for 
the navigator 
• Display if measured values inconsistent 
• Provision of measured values for further processing 
2. Determine derived state 
variables 
2.1 Determine course 
over ground 
2.1.1 Provide data and 
criteria 
• See Table 3 
• Different CMG X 
2.1.2 Compare data and 
criteria 
• Result information from 2.1.1 
• Accuracy of all input variables 
• Consistency of all input variables 
• Plausibility criteria 
• Statement concerning the consistency and plausi 
bility of the calculated values 
2.1.3 Assess result of 
comparison 
• Result information from 2.1.2 
• Consistency criteria 
• Is a measured value usable? 
2.1.4 Selection of data to 
be provided 
• Result information from 2.1.1 
• Result information from 2.1.3 
• CMG* 
2.1.5 Provision of data 
• Result information from 2.1.4 
• Representation of selected value for the navigator 
• Display if measured values inconsistent 
• Provision of selected value for further processing 
2.2 Determine speed of 
rotation 
2.2.1 Provide data and 
criteria 
• See Table 3 
• Different ROT 
2.2.2 Compare data and 
criteria 
• Result information from 2.2.1 
• Accuracy of all input variables 
• Consistency of all input variables 
• Plausibility criteria 
• Statement concerning the consistency and plausi 
bility of the calculated values 
^1 
Ul