From A Wiki of Ice and Fire
The Storm Crow is a warship in service with the Night's Watch at Eastwatch-by-the-Sea. Its rowers sit on the open deck.
A Feast for Crows
Cotter Pyke explains to Maester Aemon that they chose the Blackbird to carry them to Braavos because although the Storm Crow and the Talon are faster, they are not as good in storms because the rowers sit on open decks.
A Dance with Dragons
Cotter Pyke writes Lord Commander Jon Snow that the Storm Crow sighted the wreckage of a galley along the coast of Skagos, but he does not know the identity of the ship.
References and Notes