Rapid localise button: what is it for?

[Gargozul]

Actually, my question is in the title. On the Akula III radar console (and some on other subs too), there's a button name "rapid localise"... I tried to use it, but nothing happen, even if i have my cursor on a track. So can you tell me when you use this button, and what is it for? Thanks!

[Tin Roof Rusted]

Straight out the manual!
RAP LOC: Rapid Localization. Click to send any available WAA range information on the selected sonar contact to TMA. A tracker must be assigned to the contact. The range information appears on the next TMA bearing line for the contact.
􀂉 Seawolf’s Wide Aperture Arrays (WAA) can provide limited range information for contacts that are within 15,000 yards when conditions permit.

[Gargozul]

Thanks for your answer. I didn't took a look at the manuel, cause it's written in full english, and I'm French... But as there were no answer to my request, I finally tried to find and finally translate what I was looking for! "Rapid Localize" is in fact a way to have a more accurate position of a selected contact, if I understand...