Computed Statistics

Raw THETIS data

You can find the officially published data on THETIS publicly accessible platform.

Inferred figures

Distance travelled

TotDst = TotCO₂ / AvgCO₂Dst

ie. total emitted CO₂ / average CO₂ emitted per distance

eg. for the Armorique ship:

TotDst = (36649.07 m tonnes * 1000) / (517.37 kg CO₂ / n mile) ~= 70837 n miles ~= 131191 km

Average number of persons transported

AvgPax = TotCO₂Pax / (AvgCO₂PaxDst * TotDst)

ie. total emitted CO₂ assigned to persons transport / (average CO₂ emitted per distance per person * total distance travelled)

eg. for the Armorique ship:

AvgPax = (14841.17 m tonnes * 1000) / ((398.98 g CO₂ / pax · n miles / 1000) * 70837 n miles) ~= 525 persons

Average freight transported

AvgFrt = TotCO₂Frt / (AvgCO₂FrtDst * TotDst)

ie. total emitted CO₂ assigned to freight transport / (average CO₂ emitted per metric ton of freight * total distance travelled)

eg. for the Armorique ship:

AvgFrt = 21807.89 m tonnes * 1000 / ((514.06 g CO₂ / m tonnes · n miles / 1000) * 70837 n miles) ~= 599 m tonnes

Average speed

AvgSpd = TotDst / H

ie. total distance travelled / hours at sea

eg. for the Armorique ship:

131191 km / 4801.00 hours ~= 27 km/h

Ratio of emitted CO₂ assigned to passengers

RatCO₂Pax = TotCO₂Pax / TotCO₂

ie. total emitted CO₂ assigned to persons transport / total emitted CO₂

eg. for the Armorique ship:

14841.17 m tonnes / 36649.07 m tonnes ~= 40%

Code

If you want up-to-date and detailed formulas applied to compute the figures, please refer to the code on GitHub.

GreenFerries is a hobby project, all the data shown here has no official value. It is Open Source, so you can double check and modify it.

Ecoscore B
The Ecoscore compares average CO₂ emissions per passenger per km.
‟emits like 2.1 planes” means that the ferry emits more than twice what an average plane would on the same distance for one passenger.

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