No, the buoy is at the correct depth. That's the thing that keeps the sonar probe afloat. The sonar probe is at whatever depth it's at.
VLADs still detect the furthest, yes. In stock, VLAD and DIFAR could both see the whole spectrum of sound, so there was basically no point in using DIFAR given VLAD had the greater range. Now, VLAD only sees very low frequencies, probably no higher than 100 Hz or something. This way, you actually need to use DIFARs in addition to VLADs, as DIFARs can still see low, medium, and high frequencies.
|