Climbing rope and GPS (satellite navigation): what they have in common

1. Step 1. Climbing rope — is made of — Nylon. Nylon.
2. Step 2. Nylon — is made of — Crude oil. The raw material is petrochemical.
3. Step 3. Crude oil — is material for — Kerosene. A fraction of crude oil.
4. Step 4. Kerosene — is material for — Reusable rocket. The fuel is kerosene or methane.
5. Step 5. Reusable rocket — has part — GPS (satellite navigation). Navigation during landing.

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