688(I) Training Mission 3: Virginia slmms
 

Indeed, I am a beginner.
I should use the High Frequency Active Sonar.
Where is that panel? How does that look like?
How to use?

Or:

Where in the manual can I find "How to use the High Frequency Active Sonar"?

I really can't find it.

Thanks,
Easy

Just going to necro this since nobody answered.

Its right in the middle of the screen on the first button. Right below the towed array deployment controls.