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Does anyone know if there have been any breakthroughs in communicating with submarines underwater?
by avowud 4y ago
Does anyone know if there have been any breakthroughs in communicating with submarines underwater?
- trasz 4y agoLike lasers?
- DoingIsLearning 4y agoOptics would need line of sight. The earth's curvature puts a very hard limit to how far you could communicate. The accepted standard in underwater is VLF, but as the name implies you are only capable of very low data rates.
- ac29 4y agoThe name implies only the frequency, which doesnt have anything to do with data rates. The VLF band is tiny though - only 27kHz. The small bandwidth is the main reason it would be slow.
- DoingIsLearning 4y agoYou're correct from a DSP standpoint but the point remains VLF is very slow.
- trasz 4y agoCurvature doesn’t affect line of sight between the sub and a satellite.
- DoingIsLearning 4y agoTrue but if your emitter is not underwater like the receiver then you will have to account for air/water refraction not sure how that would work in the real world. Also I suspect it would be fairly easy for a rogue state to infer submarine locations from emitter beam orientation in low orbit space.
- sobriquet9 4y agoSince when? E-6B with towed VLF antennas seem to work ok. https://www.thedrive.com/the-war-zone/31477/heres-why-an-e-6b-doomsday-plane-was-flying-tight-circles-off-the-jersey-shore-today https://www.thedrive.com/the-war-zone/31477/heres-why-an-e-6...