Car sharing and r-7 rocket: what they have in common

1. Step 1. Car sharing — uses — GPS tracking. Tracking cars.
2. Step 2. GPS tracking — uses — GPS (satellite navigation). GPS.
3. Step 3. GPS (satellite navigation) — is part of — Reusable rocket. Navigation during landing.
4. Step 4. Reusable rocket — has part — Liquid-propellant rocket engine. Liquid-propellant engines.
5. Step 5. Liquid-propellant rocket engine — is part of — R-7 rocket. RD-107 and RD-108 engines.

Open Evothings