FaT Eels, and Hydrophone links wanted

Theyre talked about often, but not in detail, so are there tutorials out on the www that you can link here? Please!

EELS:
Adjusting FaT distances before searching begins
- and search patterns adjusting (if possible)
Pictures with arrows if you got them, please (still learning all the dials)

Hydrophone - Hit "H" key, then:
... click on what?
... turn what knob?

Again, if there's a tutorial already out there, please link and save your keystrokes for launching torps