7.4 
Dealing with unplanned incidents 
Collision avoidance 
7.4.1 
Functionality level 1 
Functionality level 2 
Function 
Input information 
Output information 
1. Manoeuvre planning 
1.1 Collect Information 
1.1.1 Record input 
data 
• Current set track 
• Foreign ship data, CPA and TCPA 
• Data of own ship 
• Surrounding situation or boundary 
conditions 
• Information necessary to assess encounter situation, 
assessment of action obligation and for planning of 
evasion manoeuvre and track 
1.1.2 Evaluate data 
• Result information from 1.1.1 
• Classification of encounter situation according to 
KVR [Collision Avoidance Regulations] 
• Assessing where action obligation lies 
• Identifying the existing boundary conditions for eva 
sion (geographical/hydrographic restrictions, other 
traffic participants, visibility conditions) 
1.1.3 Provide infor 
mation 
• Result information from 1.1.2 
• Provision of the necessary information for planning 
the evasion manoeuvre and track 
1.2 Stipulate evasion 
manoeuvre 
1.2.1 Record input 
data 
• Classification of encounter situation 
according to KVR 
• Foreign ship data, CPA, TCPA 
• Data of own ship 
• Traffic situation (i.e. other vessels) 
• Geographic/hydrographic situation 
• Visibility conditions 
• Necessary input information for determining an effec 
tive and legal evasion manoeuvre 
1.2.2 Evaluate data 
• Result information from 1.2.1 
• Evasion manoeuvre, i.e. set value for change in 
course and/or speed to clarify encounter situation 
• Time for initiation of evasion manoeuvre 
1.2.3 Provide infor 
mation 
• Result information from 1.2.2 
• Provision of set value for change in course and/or 
speed for planning evasion track