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Concepts and definitions

Dry cargo ship

Ro-ro cargo ships, bulk carriers, container ships and other dry cargo ships included in the merchant fleet.

Finnish vessel

A vessel with a length of at least 15 metres registered in Finland.

Other vessel

Other vessels than passenger ships, dry cargo ships and tankers, for example, tugboats, icebreakers, pusher lighters, fishing vessels and administrative vessels included in the merchant fleet.

Passenger ship

Passenger ships and ro-ro passenger ships included in the merchant fleet.

Passenger transport performance

Total number of kilometres covered by passengers during a specific unit of time, usually one year. Unit passenger-kilometre.


A passenger-kilometre is a measurement unit describing the passenger carrying performance of some means of transport such as a passenger car, coach, train, boat, aircraft or any transport vehicle suited for the transporting of passengers. Two persons travelling five kilometres on board a vehicle generate ten passenger-kilometres. Transport kilometres multiplied by average number of passengers.

Ro-ro ship

Vessels where cargo is loaded and unloaded by moving it on wheels onto and off the ship on ramps in the stern and bow or through side doors (roll on/roll off). If a ro-ro ship can carry at least 120 passengers in addition to cargo, it is classified as a ro-ro passenger ship.


Oil, gas and chemical tankers included in the merchant fleet.


Tonne-kilometre describes the volume of transport, and is obtained as a product of transported volume of goods (tonnes) and length of transport journey (kilometres).


Transport of one tonne of goods over a distance of one kilometre.

Transit transport

Transit transport refers to transport of a load through one country while the places of departure and destination are in another country or countries and the load is transported through the transit country without loading or unloading.

Vessel’s net tonnage (net)

Measurement of a vessel’s available capacity.

Referencing instructions:

Official Statistics of Finland (OSF): Foreign Shipping Traffic [e-publication].
ISSN=2670-2002. Helsinki: Statistics Finland [referred: 25.7.2024].
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