The Ghosting of Lady Quay (S&W)

From publisher blurb:

Any mariner can tell you that ghosting is a nautical term used to describe how a ship sometimes sails in a calm when the wind is apparently absent. One vessel particularly prone to this mysterious occurrence recently put into dock at the wharf of Swordport, a city on the shore of the Moonsilver Sea. Though she appears quite well rigged and a fair sight to the eye of any able seaman, the Lady Quay is actually a ship in terrible straits. Her captain is tormented by liquor-washed nights of self-reproach, her crew whispers mutiny, and her cargo hold conceals a freight that spells disaster for any who look upon it.