Coffee vending machine and GPS (satellite navigation): what they have in common

1. Step 1. Coffee vending machine — has part — Centrifugal pump. A pump supplies the water.
2. Step 2. Centrifugal pump — is part of — Liquid-propellant rocket engine. Turbopumps deliver the propellant.
3. Step 3. Liquid-propellant rocket engine — is part of — Reusable rocket. Liquid-propellant engines.
4. Step 4. Reusable rocket — has part — GPS (satellite navigation). Navigation during landing.

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