Knarr

A Knarr is a type of longship, designed and built to handle travel and trade on rivers as easily as the open ocean.  Straight-keeled with a centerline rudder and a single mast, these ships could sail almost anywhere given their rugged and sturdy construction and surprisingly shallow draft.
A view of a 70' long Knarr on the Calas River.
Rarity
Common, found anywhere from the furthest reaches of Colo to the Daynmor coast of Aria and as far east as the Thall Islands
Width
10' to 20'
Length
40' to 100'
Height
Masts as high as 40'
Speed
Up to 10 mph given ideal conditions, typically 6 mph.
Cargo & Passenger Capacity
8 tons per every 10' of length.