A Grey Crew is a boat that should not be there: a shape in the fog, low in the water, with oars rising and falling in time. It is grey all over, hull, sail, and crew alike, as if the fog had taken form. The rowers' faces are hidden or turned away; a figure in the stern stands with an arm raised, hailing. Their voices carry far over still water, and they call what any crew calls: a boat’s name, a harbour’s, "this way, the channel is clear". Their oars make no splash. When they pass close, the air smells of salt and wet rope, and of cold that goes to the bone.

They are seen in the Long Grey on the outer coast of the Tidelace Coasts, on the outer roads that close first in fog, near the drowned harbours where old breakwaters and signal towers stand in the sea, and in the fogs that stop movement between the sounds of the Soundchain Roads.

They want company. A Grey Crew falls in alongside a living boat in the fog and leads it, rowing just ahead, calling the way, and the way it calls is the way it went: onto the shoal, the old breakwater, the wreck-ground where it was lost. It does not attack. It leads, and when the living boat strikes, it is gone.

They carry the pull of remnants: dread, cold, and a strong urge in the living to follow a voice that sounds sure of itself. Beacons and bells seem to thin them; a boat that holds to the beacon’s bearing sees the Grey Crew drift away.

They give nothing. The danger is to crews who answer, and to pilots who trust a voice in the fog over their own soundings. Tidelace custom is simple: when the Long Grey comes in, nobody moves who does not have to, and nobody answers a hail they cannot place. Station crews ring their bells through the night and log every hail they hear.

Gnome harbour families hold that a Grey Crew is the crew of a boat lost without its story told, and that a pilot who tells a lost crew’s passage aloud at the shrine of Maris of the Tides, paying her toll of story for them, lays it to rest. Coastal Humans say the Grey Crews come for anyone who has drowned a debt. Island Gnomes at the last beacons tell of a whole Grey fleet seen once on the edge of open water, rowing in from somewhere no one has charted.

Wreckers say the Grey Crews row out of the Proud Bank on the nights they shift the channel posts, and that is why the wise wrecker works alone; the harbours say the Grey Crews are where wreckers go when they drown.