Granted I'm not on GWX, but by success with taking out C2s with one shot is like 50/50 going on 60/40. Generally what I try to do is haul ahead of the target, outside of his visual range, submerge to periscope depth. Wait until I have a shot 90 degrees to his bow and within 1000 meters of him. I plot my own solutions, and the newbie guides (which have helped me) say plot your torpedo to run at half the depth displacement (amount of the ship in the water). In this case, the C2 is I beleive 7.4, so I set the depth to run at just alittle above 3.5 meters below water. I'm not sure on the displacemnt but that's where the ship manual on the UZO screen comes in handy. When the target is at 0 degrees bearing is not the time to fire. Fire ahead of the target ussually b/w 10-15 degrees ahead of him depending on your range. One thing to watch is the color of the carrot lined up over the target. When it turns green, that's when you know you are shooting ahead of the target at just the right time, no too early or too late. Have fun!
