1. Get a good ship (Type VII , or Type IX)
2. Check the wiki manual for some hunting grounds. Direct link below.
http://www.communitymanuals.com/shii...unting_Grounds
3. Learn how to safely use TC, go surfaced as much as you can (in this case put some watch men on the tower). If you use unlimited fuel, go ahead flank (surfaced) most the time.
4. Have a good sonar man, give him medals. Go 20m or 30m once in a while to check for contacts, go slow in this case for better hydrophone range. If you find nothing, surface and cruise some 30Km.
5. Install the convoy routes map mod. It shows you the convoys routes on the map when you zoom out.
ps. In the 2 hunting areas of the wiki manual, i had no trouble finding lots of targets.
