Functionality level 1 
Functionality level 2 
Function 
Input information 
Output information 
5. Check available space 
5.1 Check water depths 
5.1.1 Record data and crite 
ria 
• Orderly way point list and con 
necting route sections 
• Geographical information 
• Hydrographic information: tides 
• Expected passage and arrival 
times 
• Expected draught of ship 
• Representation of track calculated on the sur 
rounding geographical situation 
• Selection of the relevant geographical information: 
water depths 
• Relevant hydrographic information: tides calculated 
on expected passage and arrival times 
5.1.2 Compare data and 
criteria 
• Result information from 5.1.1 
• Difference between expected water depths (taking 
tides into account) and expected draught for the 
selected track 
5.1.3 Assess result of com 
parison 
• Result information from 5.1.2 
• Statement whether the expected water depths are 
permissible 
• Representation of “critical areas”, stating cause 
5.1.4 Provide result of com 
parison 
• Result information from 5.1.3 
• Provision of determined critical areas and their 
causes for revision of the original track data 
5.2 Check channel 
widths 
5.2.1 Record data and crite 
ria 
• Orderly way point list and con 
necting route sections 
• Geographical information 
• Width of ship 
• Representation of the track calculated on the sur 
rounding geographical situation 
• Selection of the relevant geographical information 
or objects 
5.2.2 Compare data and 
criteria 
• Result information from 5.2.1 
• Difference between channel width and width of ship 
for the selected track 
5.2.3 Assess result of com 
parison 
• Result information from 5.2.2 
• Statement whether the channel widths expected 
are permissible 
• Representation of “critical areas", stating cause 
5.2.4 Provide result of com 
parison 
• Result information from 5.2.3 
• Provision of determined critical areas and their 
causes for revision of the original track data 
5.3 Check clearance 
heights 
5.3.1 Record data and crite 
ria 
• Orderly way point list and con 
necting route sections 
• Geographical information 
• Overall height of ship 
• Representation of the track calculated on the sur 
rounding geographical situation 
• Selection of the relevant geographical information 
or objects