Hydrophone Malfunction?

Hello folks,

just started playing SH and i'm trying to learn it with the realistic settings. I've ticked the option for "No Map-Contacts" and now I'm relying entirely on my sonarman to give me info on sound contact locations.

However, whenever a sound-contact's bearing and range information is announced by my sonarman, there doesn't appear to be a line from the sub to the approximate location of the contact on the navigation map, which i read in the community manual that there would be.

This seems to make locating and intercepting targets impossible, or at least very difficult.

Is this a bug, a feature, or am i missing something?

Thanks in advance folks

p.s and what does GWX mean? lol