Magnetic lodestone spoon and rope: what they have in common

1. Step 1. Magnetic lodestone spoon — is part of — South-pointing spoon (Chinese compass). A lodestone spoon that turns its handle to the south.
2. Step 2. South-pointing spoon (Chinese compass) — evolved into — Compass. A magnetic pointer.
3. Step 3. Compass — is part of — Sailing ship. A magnetic compass.
4. Step 4. Sailing ship — has part — Anchor. An anchor.
5. Step 5. Anchor — is used in — Anchor windlass. It raises the anchor.
6. Step 6. Anchor windlass — uses — Rope. The anchor cable winds onto the drum.

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