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Apparently (according to a YouTube video I watched :P) this is how they tell combustion engine powered torpedos apart via passive sonar. Analyzing the sound giv

Apparently (according to a YouTube video I watched :P) this is how they tell combustion engine powered torpedos apart via passive sonar. Analyzing the sound gives you the number of cylinders and number of propeller blades, which can identify the given torpedo type quite reliably.

bootcampwhere 6y ago
Sonar tech here, this was true 20+ years ago but new torpedo and sub blade configurations are not only highly classified but any nuclear powered subs no longer even use blades to counter this exact problem. Only old russian and N. Korean subs can be identified this way anymore. Even when I was active duty 10 years ago china and us subs were basically silent and torpedoes surround themselves with air bubbles so the acustics dont really escape. You know something is coming at you fast but that it
- m4rtink 6y ago
  Interesting! :)
- trevorishere 6y ago
  Classified and visible on mapping services! https://i.stuff.co.nz/technology/47327/Maps-site-reveals-US-nuclear-sub-secrets https://i.stuff.co.nz/technology/47327/Maps-site-reveals-US-...