Suomenlinna fortress hosts appr. 250 year old shipyard that is still used to construct and repair boats.
Mustasta portista lasketaan vesi altaaseen, kun veneitä siirretään. Sukeltajat käyvät asettelemassa tukipilarit alusten alle ennen kuin vesi poistetaan altaasta.
The water is let in from the black gate when the boats are moved. Divers will ensure that the blocks that support the boats are in place before the water is again let out.
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