Since the 6th century, major waterways were running through the gulf, and from the 8th to the 10th century about 3,000 tonnes of silver was transported there.
A 6. század óta fontos vízi útvonalak haladtak a Finn-öblön át, és a 8–10. század között mintegy 3000 tonna ezüstöt szállítottak erre.