With what communication protocol? Does high-frequency radio have the range for that?
I was thinking you could run a fiber optic cable. Those have proven themselves to work over 10s of miles in Ukraine with drones.
Sonar can work over 100km. Mines obvs need to maintain radio silence so passive mode only.
I was thinking you could run a fiber optic cable. Those have proven themselves to work over 10s of miles in Ukraine with drones.