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A comment on Hydrofoiling. Parent comment

Re:Hydrofoiling by jpm_sd on Tuesday May 11, 2021 @09:20AM (#27117742)
Big waves and high winds will cause your vessel to go unstable and crash. Ocean-crossing cargo vessels have to handle all weather conditions.

Hydrofoils significantly increase draft and nobody wants to dredge their ports and canals 20 feet deeper.

Also drag is proportional to velocity squared, so you can save a ton of fuel just by slowing down a bit. Much easier than designing a hydrofoil cargo ship.

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Re:Hydrofoiling by nradov on Tuesday May 11, 2021 @10:58AM (#27118846)
Many hydrofoil designs are retractable so in ports they don't draw much more water than a conventional displacement hull. Agreed on the other points.
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Re:Hydrofoiling by SigmundA on Tuesday May 11, 2021 @05:30PM (#27123768)
Only if you remember to retract them.
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