The US has a way for submarines to

It was almost impossible for submarines to contact any other thing on the surface because of the physical limitations of the water environment. However, that is about to become a reality thanks to a wireless system that has just been successfully developed by scientists at MIT, allowing direct transmission of data from under the ocean to even aerial aircraft.

Called the translational phonetic communication system (TARF) , this system allows ocean submarines to send an ultrasonic signal to the surface of the water. Binary information 0 and 1 will be encoded with a tiny oscillation to create different frequencies. On the water, an extremely high frequency radar (from 30GHz to 300 GHz) will recognize the extremely small change of frequency, thereby decoding and thereby turning into meaningful information.

Currently, the system only operates in waters with a height of about 16cm waves.

It is worth mentioning here that the TARF system can operate in both calm and dynamic sea conditions because it uses an intelligent processing algorithm with the ability to distinguish between big waves in the sea and what are the signals The signal is sent as well but the waveform is extremely small. Currently, the system can operate in waters with a wave height of about 16cm but soon, MIT will find ways to improve it to be used in all sea conditions.

Again talk about the amount of information it can send. Currently the system has not been able to send images or contents that report highly detailed, complex details but can only send a few hundred bits of data every second, which is lower than the old dial-up modem systems. . On the other hand, data is only sent one way. However, from the point of view of scientists or military, it is more than enough to have many different applications. For example, the submarines are now able to use TARF to send useful information to airplanes, drones or sea surface ships, but still securely hide under the ocean. From a combat perspective, this is a success.