If screw-driven steamships generally carry the prefix 'SS' before their names, what type of steamers carry the prefix 'PS'?
Paddle-wheel steamer Sidewheel Stern-wheelers Side-wheel steamship Paddlesteamer Sidewheel paddleboat Paddle-steamer Sternwheeler Sidewheelers Rotaremis vehiculum Side-wheel steamer Paddle vessel Paddle steamers Stern-wheeler Side wheel steamship Paddlewheel steamboat Paddle wheeler Steam paddler Side wheeler Paddle steamer Sternwheelers Paddle-tugs Paddleship Paddlewheelers Sidewheeler Paddle wheel boat Side wheelers Sidewheel steamer Stern wheeler Sternwheel Paddle wheelers Paddle Steamer Paddlewheeler Paddle wheel ship Paddle steamship Stern wheelers
sternwheel stern wheeler sidewheeler sidewheelers steam paddler paddle wheel boat side wheelers paddleship paddle wheel steamer paddle wheelers paddlewheeler sternwheeler sidewheel steamer side wheeler paddle steamers paddlesteamer side wheel steamship paddle wheeler paddlewheel steamboat paddle steamer side wheel steamer rotaremis vehiculum paddle wheel ship sidewheel paddleboat sternwheelers paddlewheelers stern wheelers paddle steamship sidewheel paddle vessel paddle tugs
paddle steamers
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Paddle steamers