[banryu79]

Originally Posted by in_vino_vomitus

Yeah - Have read the manual - but missed that line - good point - as for the dipping sonar issue - although the helo *looks* like it's using it's dipping sonar, it doesn't seem to be detecting subs that are as little as 1000m away - It's certainly not reporting them.

Well, I'm not familiar with the dipping sonar capabilities in active mod in Vanilla DW, go figure in LWAMI!
But before thinking the behaviour you are experiencing is a bug, consider the possibilty it is in fact a feature!
I can give you two possibe reasons for why your active dipping sonar is not acquiring an enemy sub at 1000 meters.

First:

 

Active Source Levels (ASLs) have also been rescaled. LWAMI ASLs are proportional to the mass of the ship or submarine, and are also reduced slightly for submarines known to use anechoic tiles. Acquisition ranges are now lower for smaller ships and subs and longer for larger ones. Midget submarines will be very hard to acquire. ASLs for torpedoes and mines have been reduced to the point that they are no longer detected by standard active sonar (but still appear on short-range high-frequency sonar, of course).

An second, as you already have read:

 

The helo has an active dipping sensor (which of course can be heard on submarine active intercept) set at 45ft of depth. The helo also has passive sensors set at 45ft, 600ft, and 1400ft. All sensors are active at the same time; there is no waiting for the sonar to be lowered. To compensate for this efficiency, we have reduced the sensitivity of the AI sensors on the MH-60.

If you put in the equation the two reasons above and add in the changes LWAMI put in general in the acoustical model for the game, chances are that what you are experiencing is in fact exactly correct. Or maybe not, go figure