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I thought a bascule had only one "leaf", and a drawbridge had two. So you aim for the high side of the bascule, but for the middle of the drawbridge. that's why mariners may want to the know the distinction
But I think the term "drawbridge" is taking over both types in common language. They have a hinge, and rotate upwards, whether singly or in pairs.
Swing bridges are common with railroads. Most rotate around a central turntable. A few swings are floating bridges, usually swing from one corner.
But what you passed under sounds like a "bridge" all right. You just caught someone with a reason to be grumpy.
Lift bridges stay horizontal, lifted on both sides by towers.
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