181 
Process: 
5. Recording the present situation 
Name 
Date 
Created: 
Mathes 
28.5.98 
Data flow: 
Object data 
Checked: 
1. Origin 
• The source of the transmitted object data must be known. Each object must be uniquely 
assignable to the particular data supplier. 
2. Validity 
• Object data should be checked for their validity. The result of the check must be made 
available to processing procedures. 
3. Quality 
• The object data displayed must be sufficiently up-to-date. The necessary updating rate is de 
pendent on the relative speed between observed object and own vehicle. 
• Object data from differing sources should be checked for consistency. 
• Possible deviations as regards the position and movement of an object which has been located 
by different sensors should be borne in mind. This applies particularly if a display 
unit (e.g. ECDIS) is connected with different sensors for object identification. 
4. Harmonisation 
• The display and indexing of observed objects must be identical on all display equipment. 
5. Criticality 
6. Limit values and alarm facilities 
• Alarm on loss of information concerning objects. 
7. Representation/dispiay