Why is "no map contact update" so cheap in realism percents (GWX)?

[Abd_von_Mumit]

I play GWX and 100% realism settings. I like the sunk ships icons on the map that I see on screenshots of some of you and I tried to find the way to have them on my map too. And what I found is "No map contact update" option in realism settings. I've always had it switched on, so I've no idea, what it is responsible for. But now the strange thing - switching that option off still gives you total of 100% realism. So let's try, I thought.

And what I found was just smashing! With this option off I have free access to so vast load of information, that my head blows off. With INSTANT bearing and distance to all the targets around me at least 10 km away from me:
- I don't have to manually estimate the target's course,
- I don't have to manually estimate the target's speed,
- I don't have to operate sonar personally, as it's a one look on the map and I see them all, the bloody DD's and how they are trying to hurt me bad.

So...
- I don't have to look for my target any more after my SO tells about a new contact,
- I also never loose my target with that option on,
- I find the target much, much faster than usually, as I don't have to estimate it's coordinates, course and speed by sonar manually.
And possibly some other remarks.

Das opschion iz evil!

I've got only one question: how the hell come that with that option you are still able to play "100% realism settings"? I think it should be punished much more or at least equal as external camera or event camera.