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At random: A submarine often navigates by sound when submerged. Sound can travel 3,000 nautical miles or more through water.

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Steve

Posted 2017-10-20 9:39 AM (#86401)

Senior Crew

Posts: 106

Location: Santa Fe, NM

Subject: Submarine Hunt

https://www.msn.com/en-us/news/world/a-russian-ghost-submarine-its-us-pursuers-and-a-deadly-new-cold-war/ar-AAtLTc1?li=BBnb7Kz

Ric

Posted 2017-10-20 10:34 AM (#86402 - in reply to #86401)

Plankowner

Posts: 9163

Location: Upper lefthand corner of the map.

Subject: RE: Submarine Hunt

That is what we were doing 50 years ago.

rover177

Posted 2017-10-21 1:50 PM (#86412 - in reply to #86401)

Master and Commander

Posts: 1576

Location: Wollongong, NSW

Subject: RE: Submarine Hunt

Nothing has changed. Any modern non-nuclear propelled submarine is hard to find when not running main engines.
Sound waves can have interesting travel patterns. Sea-Water Temperature changes can result in large virtually not forecastable shadow zones. Yes they will be there but exactly where? Only local presence can show - for that given time and depth.

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