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
side wheel steamship paddle steamer paddle vessel paddlesteamer paddlewheelers sidewheel steamer sidewheelers paddleship paddle steamers sternwheelers paddle steamship paddle wheelers stern wheelers paddle wheel ship paddle wheel steamer sidewheel paddleboat paddle wheel boat side wheelers sternwheeler paddle tugs paddlewheel steamboat side wheel steamer rotaremis vehiculum paddlewheeler stern wheeler side wheeler sternwheel steam paddler sidewheel paddle wheeler sidewheeler
paddle steamers
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Paddle steamers