Stilt footrests and sonar: what they have in common

1. Step 1. Stilt footrests — is part of — Stilts. Platforms at height.
2. Step 2. Stilts — uses — Lever. An extended support.
3. Step 3. Lever — is used in — Bit and bridle. The bit acts as a lever on the jaw.
4. Step 4. Bit and bridle — is made of — Leather. A bridle is leather straps.
5. Step 5. Leather — is material for — Submarine. It was covered with leather.
6. Step 6. Submarine — has part — Sonar. Underwater acoustics.

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