But that Wikipedia article also says "A knarr is a type of Norse merchant ship used by the Vikings." And Harald Hardrada gets no trade bonuses in Civ VI. =| The reason why the merchant ship was used during the Viking expansion was because they wanted to trade as well as pillage during that time (and certainly during Harald Hardrada's time, as the blog post attests). Hence the knarr was built for long voyages. They really should rename the ability or add at least some trade component to it, IMO.