Maybe he didn't invent a new system. He did, however, find a use for an existing technology that could become a standard. Look at the avalanche transmitters people wear - old technology, new use.Built; Yes
No doubt it is a creative use.Maybe he didn't invent a new system. He did, however, find a use for an existing technology that could become a standard.
Yes but my understanding of the navy's system is that a 3 letter code group takes around 5 minutes to transmit. It could be they are using a very narrow bandwidth to increase the signal-to-noise ratio, they are sending to the other side of the world after all."Texting" doesn't require a whole heck of a lot of bandwidth. One of the most efficient Amateur Radio digital modes, PSK31 requires only 31.25Hz for up to 50WPM (32bps), requires very little power and performs excellently under difficult propagation conditions.
No Forward Error Correction at all. It's CW or morse code, at least the systems in the 70's and 80's were.
Per your Wikipedia link:I am fairly sure the VLF system has evolved beyond simple CW.
Communication with submarines - Wikipedia, the free encyclopedia