To get an initial reading from hydrophones, I do have to be below periscope depth, it seems. But once I get a contact, I can go to periscope depth, watch the target thru the periscope, and ask for updates, and I'll get sonar updates regularly. Only if I then return to the sonar room and manually move the hydrophones around (with Home/End keys) do I lose the contact.
So, they do sometimes sorta work at periscope depth, for me anyway.
|