With the MOD 2.01, the active world is completly changed from stock DW.
For subs and fregate.
Lets talk about the fregate active because you ask for :
Before 2.01, single beam use was very marginal.
Just because omni rotational was VERY effective, even under the layer.
So you detected (ping return) any submerged contact at 10 miles, and were able to see it on the sonar screen at 9 miles ...
no need to use single beam in this case.
But now, this is completly changed, single beam become the main tool to find submerged contact already detected by omni rotational.
Here is the process : first, you use omni (rotational, never directional, only used if rotational is destroyed, that's all)
you hear a ping return at 16kyrds, but you see nothing.
So switch to single beam, and search again the ping return on every bearings, 20° per 20°.
Once you get it, the same ping return at 16kyrds (or maybe less now if you closed the target), it will be MUCH more easy to find it :
instead of 240° to search for a contact, you have just 20° now.
So even if you don't see the contact, you have the distance (ping return gave you) and only 20° to search at.
This way you will find it in some seconds, instead to use lots of time to find it on rotational on 240°.
As I told you, the OMNI (...directional) is only used if your rotational is destroyed, because it is much less efficient.
Now, the active sonar of the fregate (and subs...) need real train to use it corretly, with efficiency, for the good of DW.
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