Mittelwaechter made a movie quite a while ago on how to do a passive hydrophone hunt. I asked him privately if he could re-upload it, which he did recently. He was lucky to find it on one of his old harddrives. The way he does it looks very much like abclkhan's steps.
The movie is a very good quality. It is not your regular movie format though, it's a self-playing AVI (so actually a .exe) compressed by using
RAD Game tools. The fact that is an .exe may scare you wrt virusses and so on. But I find there is no reason for that. My virusscanner (AVG 7.5) is perfectly happy with it. And my pc isn't acting up yet either. But that is ofcourse no guaranty.
A drawback is that it plays no sound and that it is in 512/384 pixels, and not fullscreen. But if you add " /W1024 /H768" at the end of the filename in a shortcut to the file it will stretch the movie to those dimensions (or whatever you desire).
Get it while it is still there:
http://rapidshare.de/files/38491800/...oHunt.exe.html