I almost sunk the Norwegian ship, but just as I was about to fire the torpedo I was able to *just barely* make out the flag (this was around midnight). I'd been tracking the ship four 4 hours (game time) and set up a perfect 90-degree shot, had the unlit ship coming to zero degrees gyro when I just spotted the faint cross and then saw some color and the whole crew let out a sigh of disappointment.
So why are they running without lights? They're *asking* to be sunk!
The same ship 11 months later would be fair game, but I assume the "Flaggen" tool in GWX has accurate dates for neutrality and allegiance.
Oh well. At least I didn't fire. Door was open, finger on the trigger, straining to see the flag before he came to zero degrees on the gyro.
What a ride though!