Cathode (lithium metal oxide) and GPS (satellite navigation): what they have in common

1. Step 1. Cathode (lithium metal oxide) — is part of — Fuel cell. A cathode for oxygen.
2. Step 2. Fuel cell — uses — Hydrogen. The fuel is hydrogen.
3. Step 3. Hydrogen — is used in — Liquid-propellant rocket engine. Hydrogen is an efficient fuel.
4. Step 4. Liquid-propellant rocket engine — is part of — Reusable rocket. Liquid-propellant engines.
5. Step 5. Reusable rocket — has part — GPS (satellite navigation). Navigation during landing.

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