Thanks that totally answers my question. Yes my seats are totally enclosed by full height railing and I've been around boats for my entire 41 years which is why I ask what I'm unsure of. Logic told me me the seats I have aren't for high speed travel, but being new to pontoons figured better ask. I plan to replace, but if that means spending $$$ on seats, I want them usable even when under way.
Cool. Lots of options for seating with shorter and stouter pedestals, can get adjustable pedestals, swivels, sliders, lots of nice new stuff available off the shelf for replacing those.