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Author Topic: How secure are missile carrying nuclear submarines  (Read 1927 times)

Offline syhprum

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At one time the missile carrying submarine was considered the ultimate undetectable weapon but detection technology moves on there are three types of radiation emitted by these submarines firstly thermal with their 100MW reactors secondly they create a gravitational anomaly (we might say they emit Gravitons) and thirdly they emit Neutrinos and a small leakage of other sub atomic particles.
While no compact Neutrino detectors seem likely to be developed satellite detectors for gravitational and thermal anomalies have been developed for scientific purposes and could certainly track submarines.


 

Offline graham.d

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Re: How secure are missile carrying nuclear submarines
« Reply #1 on: 21/03/2013 20:26:50 »
I would be surprised if anyone could detect the relatively small gravitational anomaly of a submarine especially from a satellite though there was a really awful SciFi film (Battleship) that was doing something like this with alien craft. Thermal imaging is remarkable sensitive but if the submarine was deep enough this would be tricky too I suspect. If it could be done it would be a secret anyway! Sound is traditionally the way submarine detection is done and (this is not a secret) it will be (and, may be, is) done by dropping lots of disposable detectors equipped with gps and radios to send their data via a satellite link to fixed base to coordinate the readings. This is just a more automated and elaborate technique than what has been done in the north atlantic for over 30 years.
 

Offline evan_au

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Re: How secure are missile carrying nuclear submarines
« Reply #2 on: 22/03/2013 10:03:55 »
Gravitational probe satellites studying the Earth need to orbit above the atmosphere, which restricts their sensitivity and resolution (this limitation does not apply on the Moon). If they are flying (say) 10km apart, they could detect an increase in local gravity that is perhaps 10km across; flying closer would reduce sensitivity away from their flight path.

However, a submarine has neutral density, ie it has the same mass as the water it displaces, so it does not produce a gravitational anomaly. Even if it were lying on the seabed (slightly denser than water), satellites 10km apart would have trouble detecting a submarine that is less than 200m long.

Other potential techniques for detecting submarines include:
  • Magnetic anomaly detectors: any ferromagnetic material in the submarine (like iron or nickel) will slightly distort the Earth's magnetic field. Modern superconducting detectors use quantum effects to measure magnetic fields very accurately. (Magnetic materials can also develop a magnetic field of their own, but this can be cancelled by passing current through a coil.)
  • Density waves: As the submarine moves, it pushes water out of the way. This can disturb the boundary between layers of different density in the ocean,  spreading out as ripples which might be seen by ocean-imaging radars carried in satellites.
  • Sound detection on the seafloor: Sensitive Microphones placed on the seafloor can detect passing submarines.
  • Decrypting communications: In the second world war, Britain was able to intercept radio communications to German submarines. Today this communication uses low-frequency radio transmitters, plus probably satellite-based lasers, optical fibers and possibly even neutrinos. But detecting communications from a submarine back to base would be even more effective...
  • Stealth: Follow them when they leave harbour.
« Last Edit: 22/03/2013 10:41:37 by evan_au »
 

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Re: How secure are missile carrying nuclear submarines
« Reply #2 on: 22/03/2013 10:03:55 »

 

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