WernerSobe's
manual targeting tutorials? He has two on TDC/PK work and another one (slurp!) on sonar only targeting.
You might have to look on page 5 for my links if his are down. His sonar only targeting is the most fun you can have in SH4 in my opinion (of course it's my opinion, I'm writing it!:rotfl: ). WernerSobe's videos are worth any mod out there in adding to my enjoyment of the game.