So we have a new world coming in with oceans, and I couldn't be more excited! Risky travel, locality, geographically and exhaustion limited fast travel, piracy! How excit...
No piracy you say? What do you mean Knarrs can sail to trade ports empty and teleport home full of cargo? What good is that I say?
Knarrs should not be able to teleport with cargo. I would settle for 'can not cross oceans with teleport when full of cargo' but I really would just rather see it 'at all with cargo'. Piracy and high sea hunting of other players isn't going to be a thing if there's no prize outside of ganking involved. (at least, for those looking for a prize for their assault, anyway).
So remove this ability from Knarr's so that you can still take raiding parties and teleport home with their inventories, but you can teleport home with a Knarr full of goods.