Some USN subs used to be retrofitted here in the VI and I was called to pick up some of the transmitters which required a fork lift to put the transformers on the back of a truck. The RF deck used a pair of 4CX5000's and they appear to drive some sort of transducer for underwater communication. One of the techs called them "fish phones" for underwater to surface communications. I am not sure what the modulation scheme was nor what technology it was replaced with but both methods were a form of two way underwater communications. I had heard that the mile long trailing wire method was abandoned in favor of a brute force method to drive data via salt water to the surface.
Herb Schoenbohm, KV4FZ On 5/8/2012 9:38 AM, ZR wrote: > ELF sub communication was to get a signal to a submerged sub and it still > took megawatts and an extremely slow bit rate. All it did was to tell the > sub to come up enough to deploy its satellite antenna and get high speed > burst data. > > Carl > KM1H > > > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
