7.4.2 
Grounding avoidance 
Functionality level 1 
Functionality level 2 
Function 
Input information 
Output information 
1. Plan evasion track 
1.1 Collect information 
1.1.1 Record 
input data 
• Present set track 
• Hydrographic and geographical infor 
mation from the sea chart 
• Data concerning water depth + “past 
display" 
• Visual observation 
• Information necessary to assess the situation and to plan 
the evasion track 
1.1.2 Evaluate 
data 
• Result information from 1.1.1 
• Assessment whether necessity of evasion exists 
• Identification of “hazardous area” 
• Identification of restrictions (scope available for manoeu 
vring) 
1.1.3 Provide 
information 
• Result information from 1.1.2 
• Provision of necessary information for planning the evasion 
track 
1.2 Plan evasion track 
1.2.1 Record 
input data 
• Set track 
• Position of own ship 
• Area for which grounding risk exists 
• Space available for manoeuvring 
• Necessary input information for planning the evasion track 
1.2.2 Evaluate 
data 
• Result information from 1.2.1 
• Set value for course/speeds for the individual sections of 
the evasion track 
1.2.3 Provide 
information 
• Result information from 1.2.2 
• Provision of the planned evasion track for further use in the 
system 
2. Monitoring and 
following evasion track 
2.1 Follow evasion 
track 
2.1.1 Record 
information 
• Deviation between planned evasion 
track (set course and speed) and pres 
ent values of ship 
• Distance of actual ship position from the 
planned evasion track 
• Necessary input data for following the evasion track 
2.1.2 Assess 
information 
• Result information from 2.1.1 
• Necessary actions (set values for course/rudder angle and 
speed) in order to follow evasion track