the sound trainer mission, readme, and charts can be downloaded using these three links;
download link to sound_trainer mission phase I;
http://rapidshare.de/files/17277069/...ainer.mis.html
download to readme link;
http://rapidshare.de/files/17277609/ReadMe.txt.html
download link for charts;
http://rapidshare.de/files/17277734/usom.pdf.html
the dowload links below are for the same mission i did when i wrote the sonar utuorial, if you are going to read the tutorial, you might as well try the mission, and see how well you do, good luck!
PHASE III
download link for mission;
http://rapidshare.de/files/17280964/...cking.mis.html
download link for readme;
http://rapidshare.de/files/17281043/ReadMe.txt.html