Rocket guidance unit and submarine: what they have in common

1. Step 1. Rocket guidance unit — is part of — R-7 rocket. A gyroscopic guidance system.
2. Step 2. R-7 rocket — evolved from — V-2 rocket. The Soviet rocket programme began by studying the V-2 (the R-1 was its copy).
3. Step 3. V-2 rocket — has part — Gyroscope. A gyroscopic guidance system.
4. Step 4. Gyroscope — is part of — Torpedo. Obry’s gyroscope keeps the course.
5. Step 5. Torpedo — is part of — Submarine. Torpedo armament.

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