688(I) Training Mission 3: Virginia slmms

[easy]

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

[Gargamel]

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.