Overview

Vessel traffic is often the most important source of emissions in a port. The data for vessel emission calculation include port call information (from PMIS or AIS data, for example) and background information on various technical aspects of vessels and the port in question.

You can see the visualisation of trends in the current and previous years in the first graph, and compare the emissions by different variables (terminal, vessel type, activity) in the next graphs. You can also choose the time interval you wish to investigate. The list on the right shows the emissions according to the selected variables. You can also export the emission calculation results in spreadsheet from the three dots in upper right corner. The exported excel includes all port calls, define the vessel in question and separate the emissions of each compound from different phases of a port call (berthing, cruising, maneuvering) in addition to the total emissions.

In the upper right corner of each graph you can choose if the emission bars are ordered from the biggest to the smallest emission source, and if you want to see all the terminals or only those including some results.

Vessels' technical data

The calculation uses the most exact information available on the vessel. For example, if the engine power of a certain vessel is known in the database, that will be used; if the information is missing, the system uses the average engine power of that vessel type. The technical information of vessels can be seen and modified in the "Vessels" tab. After saving the changes, the system uses given information in the calculations. Note, that in case of AIS calculations the whole year is recalculated after data processing occurring every night.

Port calls

Port call data can be imported manually from spreadsheets or via an integration to PMIS or AIS systems. From the tabs "Port calls" and "AIS Port Calls" you can see the port calls used in the calculation. In the AIS, there may be more movements under one port call, as the data is tracked from real location messages and combined.

Updated on: 20/10/2025