Catamaran and aeroplane: what they have in common

1. Step 1. Catamaran — has part — Hull. Two hulls.
2. Step 2. Hull — uses — Archimedes’ principle. The hull displaces water.
3. Step 3. Archimedes’ principle — is used in — Seaplane. Floats.
4. Step 4. Seaplane — is a kind of — Aeroplane. An aircraft.

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