Definitely adds another layer to your operations when you can't just zip over with the external cam to check a target out.
Personally I'm more concerned about the nationality of the target than ID'ing the ship type itself.Probably because most of the time the ship's right on top of me and I'm still flipping throught the manual like a maniac.
If I can ID the ship type all well and good,if not,confirm nationality,set the torps to 2m and let rip.
The number of times I've gone through the process of gathering all the data,got into a good firing position and fired without checking the flag...
Now I try and remind myself to check the flag before firing but mistakes do happen
I feel it just brings another element to the attack especially in rough weather and poor visibility.