Dotted Circle?

[mheil]

Originally Posted by Fab

I was told by Cdre Gibs that:

circle at 12000m = Range of main guns
forward arc (approx 270º) at 4000m = Range of Hydrophones
circle at 3000m = Range of Secondary Guns and/or AAA.
forward arc (approx 160º) at 1500m = Range of ASDIC

Distances and angles are taken from NYGM TW 2.0. The stock angles and distances are different, but the idea is the same.

I have seen the dotted circle occasionally but have not seen the other circle/arcs. Is this in the vanilla? A MOD?