Originally Posted by
ChrisJ800
My last sailboat had downward sonar (depth gauge) and forward looking sonar for going into an anchorage. I assume these low current devices are not stealthy. I can understand a sub switching these off in time of war or when in foreign waters and wanting to be stealthy, but why not use them for the rest of the time? Obviously I am a pilot who can sail, but not a submariner! But is there a balance between safety and stealthiness?
Even in peacetime, attack submarines spend their time doing stuff they don't want anyone else to see. How better to practice tracking and getting into position to attack an adversary, than doing it for real? How better to gather sonar and other data on your counterpart's vessels and capabilities? This is no secret; everyone's doing it, everyone knows everyone's doing it, and there are some pretty good books on the subject.
I should imagine the holy grail of underwater warfare is being able to track and take out your adversary's SSBNs, so you can bet there's a lot of effort going into this; if anyone does have that capability, you're not going to read about it for a very long time...