Sound wave and diesel engine: what they have in common

1. Step 1. Sound wave — is used in — Echo sounder. A sound pulse.
2. Step 2. Echo sounder — evolved into — Sonar. Echolocation.
3. Step 3. Sonar — is part of — Submarine. Underwater acoustics.
4. Step 4. Submarine — has part — Diesel engine. Diesel-electric submarines.

Open Evothings