Vernier scale and rope: what they have in common

1. Step 1. Vernier scale — is part of — Vernier caliper. An extra scale for tenths.
2. Step 2. Vernier caliper — evolved into — Micrometer. A more precise instrument.
3. Step 3. Micrometer — has part — Shackle. A rigid frame.
4. Step 4. Shackle — is part of — Anchor. The chain mount.
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.

Open Evothings