[No one else seems to be commenting, so I am just going to go with what these two have said and move on]
Rana: "I can hire you a ship run by a dwarf named Rufus Dregnor. I have had dealings with him for years. In fact, he was the captain of the ship that Hermod and i were aboard when the dragon attacked. He values Irusyl's business and fears our wrath, but most of all, he is a true friend. He won't dump you in the river, I am sure of that."
Rana leads you to a small black ship with several rowing positions below deck on each side. The ship also has a mast with a large sail that can be deployed when the winds moving through the tunnels are positive (they usually move quickly towards the North. Because the current moves South, the river is effective both ways depending on whether the sail is up or not.
After Rana confers with him, Rufus, armored, bearded, and shaped like a stout block, greets you along with his two guards, hardy half-orcs named Igos and Dhark and his elven first mate Rysian. "Welcome aboard, I can get you into Luskan within the week."
(Anything to say or do before embarking?)