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"
United States Ship. I think
Sailing Ship or Steam Ship.
It stands for steam ship.
Saints in the plural like SS Peter and Paul Does not refer to Steamship or nazi Intelligence/security agency! Not the Waffen-SS!
The ss stands for steamship.