The Queen's Ferry (or as it's sometimes referred to as, the Ferry Queen) is the most reliable of the flat bottomed boats that travel down the Oh'yio. The transport gets it's unusual name because of it's unusual origins and captain. The Queen's Ferry is actually a living tree shaped by ancient elven magic. While that in itself is quite unusual, the tree-boat is also home to a kind dryad named Chesh. The captains of the ship are a pair of elven siblings, Melius and Aria, who inherited the ship from their mother. The pair are odd by Portsmaw standards, but have noble hearts and tend to give discounted rates (or free passage) to those on noble quests or in need.
More information of the Portsmaw setting can be found here.