Not a submariner or anything close to it - but communicating with subs, even at a deep depth of 1000 feet, needs very low frequency radio waves. I expect its a speciality, very costly system with limited commercial/public practicality.
and this thing is at 13,000 feet.
Thanks, I understand better now. I read the CEO had said that spending excessively on safety is a waste at some point; that if you really want to be safe, stay home in bed.
In such a terrible situation, I wonder if the survivors start thinking about how much air and if anyone should “volunteer” to stop breathing to give the rest a better chance or more time to live, at least? I wonder if there is any precedent in history, late revealed by survivors who were rescued? Like the Rugby team that crashed their plane in the Andes mountains and cannibalized the bodies to try to live.
And why on Earth would they apparently not have an ocean locator beacon or transmitter to turn on to aid in rescue,
Not a submariner or anything close to it - but communicating with subs, even at a deep depth of 1000 feet, needs very low frequency radio waves. I expect its a speciality, very costly system with limited commercial/public practicality.
and this thing is at 13,000 feet.
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The Navy once had ELF systems that could penetrate seawater to 1000 ft or so, but shut them down in 2004. They operated on a frequency of 60 hz where the wavelength is something like 2500 miles. The Navy still maintains VLF stations that transmit between 14-60 khz. One I know of was in Cutler, Me. and operated on 24 khz. They use a 50 baud digital transmission mode and are one way transmissions. Nuclear subs need to be at or close periscope depth to receive the transmissions or else trail a LONG wire antenna attached to a buoy. The plot of the movie movie Crimson Tide involves the malfunction of the sub’s VLF system to receive launch orders. A deep submersible would have no capabilities to receive or transmit at any depth approaching 2.5 miles.