With manual, if you hit a critical part of the ship, there is a chance it will explode,

With auto, if you hit a critical part of the ship, it will explode.

If you hit any other part of the ship, sinking happens normally in both Auto and Manual.

With Grey Wolves, manual targeting, no WO help, I am getting about

-15 to 60 thousand tons per patrol.

12k is the lowest, 60k the highest. Usually 20 to 30k.
I sunk ships every patrol. :ahoy:

My patrols have been short: less than 18 days, because I have been throwing all my torpedoes at convoys and resupply has not been convenient.

I have sunk ships with 1 torpedo, especially tankers, but I usually have to work quite hard to sink all other kinds. (One medium tanker last patrol seemed unsinkable. 4 torpedoes. Bad waves. Waited forever. No sinking.)

I really like the realism of this. (Sinking variability.) It seems right.