Where are all the enemy Ships?

[despat]

Originally Posted by -Pv-

South China Sea is one of the most heavily populated enemy areas in the game.
I don't think you are suffering from a bug. I suggest you end your patrol by going home and get your crew and sub beefed up for a patrol in a new area.
After docking at base, you will enjoy faster save game reload times.
-Pv-

Which base should i dock at; will any surfice or must it be the initial base (Midway)? I use to be able to see marking on my map showning the bearing of enemy ships (even in areas far away from me), but now not a single on in sight. Surely, something has changed. nothing at all in the south china area.