Sword and atomic clock: what they have in common

1. Step 1. Sword — has part — Handle. A handle.
2. Step 2. Handle — is part of — Tennis racket. A wrapped grip.
3. Step 3. Tennis racket — is made of — Carbon fibre. Modern frames.
4. Step 4. Carbon fibre — is material for — Military drone. The airframe is composite.
5. Step 5. Military drone — has part — GPS (satellite navigation). Satellite navigation.
6. Step 6. GPS (satellite navigation) — uses — Atomic clock. The satellites carry atomic clocks; the position is calculated from signal arrival times.

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