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Surface effect ship

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Surface Effect Ship SES and Air Cushion Catamaran technology

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SES Catamaran

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Surface Effect Ship SES-100B (Sidewall Hovercraft) 1974 US Navy CNO SITREP

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SES100B Surface Effect Ship US NAVY

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SES technology

A Surface Effect Ship (SES) or Sidewall Hovercraft is a watercraft that has both an air cushion, like a hovercraft, and twin hulls, like a catamaran. When the air cushion is in use, a small portion of the twin hulls remain in the water. When the air cushion is turned off, the full weight of the vessel is supported by the buoyancy of the twin hulls.