What does ss stand for before a boat name?

Answer:

SteamShip. This meant the boat or ship was powered by a steam engine rather than sails. In modern times it can still refer to a steam tubine, though it is often misused to simply indicate "non-sailboat"

First answer by ID3628323609. Last edit by Improbcat. Contributor trust: 177 [recommend contributor recommended]. Question popularity: 6 [recommend question].