Normally yes, but from what everybody says here on the forums, the enemy actually doesn't get alerted to your pinging them or pinging for depth. Just another unfinished component to the game. You can thank UBISoft, I guess.

Id think they do, Ive done a test with it. I was sitting in free cam a just inside a DDs passive range and did a depth ping and he came right for me ( Iwas in his range before hand for quite some time too so it wasnt that he just discovered me)

I wish we knew for sure. Others keep saying that they can't detect it, and they have never shown in an obvious manner that they have detected it when I've used it myself.

Edit: I remember making a thread asking when to use Sonar, as I was concerned about this sort of thing. Here it is.

The destroyers CANNOT hear your pinging....a little crazy I agree but tis true.

You are right that it is a bit crazy as it defies logic. I'll take your word for it. I just prefer avoiding anything that could alert destroyers.

Scapa is pretty safe, can go down to ~18 meters almost anywhere in the harbor. Deep enough that DD's won't run over your conning tower and depending on your speed the depth charges will explode well below you and not cause any damage as they don't explode till they hit bottom. Since bottoming your boat is tactically useless because of the game engine unless you're doing repairs you should never be sitting on the bottom anyways.

Gibraltor is all about where you get caught if a DD gets on your trail. With so many ships you can easily hid next to one/under one and wait - though only way to get out of that situation is to sink it and for that the escort needs to be careless enough to go at least 300m away from you before you can fire a shot that will sink her.

Sometimes my safest getaways have been to slam down the throttle and screw being silent, just get away to a position where you have room (depth or obstacle wise) to manuever and let them drop all the charges they want. Escorts don't seem to be so accurate when you're moving at flank and making any kind of turn (whether its just a few degrees or a knuckle); the explosions may still push you around but don't cause any damage when you're out of position. Gibraltor has holes in various places in the subnet so if you're patient you can trap escorts on the other side of them or get them to sink themselves ramming into a pier.

There sonar can also 'see' you if you are at the other side of a land mass :yep::doh:

Figured that might be the case. I mean you can detect radar emissions from behind large hills and islands, so why not them when it comes to sonar?

Yeah. I noticed that when I took U-96 through Gibraltar. I kept "hearing" ships through jettys. :har: