1. Turn off AA
2. Use the white line in torpedo mode to know what speed/direction a target is moving.
3. Use dem smoke
4. Don't use the main guns unless really needed, you will be detected right away.
5. Set up traps.
- Do tip number 2 in determining which way they are going to use and find a spot where you can use the tiny nooks in the map to just sit in the corner and wait to unload them torpedoes. (also works if you are spotted, just yank your DD in an Island where then can come in thinking you are hopelessly stuck and greet them with torpedoes.)