No, a hydroplane doesn't land on water--that's an aquaplane. A hydroplane is a plane that gets electric power from an onboard water reservoir with a tiny dam and turbines.

"Planespotting", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

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No, a hydroplane doesn't land on water--that's an aquaplane. A hydroplane is a plane that gets electric power from an onboard water reservoir with a tiny dam and turbines.