@Fitzcarraldo:
I was under the impression that some Neutrals are not necessarily 'neutral' in that they are aiding the allies but it is up to you to make a decision whether to attack or not based on their visible deck cargo (trucks, tanks, airplanes), their behaviour (whether they start to zig zag when you close distance to visually check them or not), and their position (are they headed to allied ports loaded with war materials).
I only use the Interim mod but am tempted to see if I can run the full version simply because I like the idea of having to check individual vessels regardless of what flag they fly and make a decision on whether they take a swim or not. From the original post:
This sets off alarm bells, especially if this convoy is headed to England, notice the deck cargo, that'd get an eel from me for sure.
Now if only someone would answer my original question about TMT / Thomsens Ships and Ricks Rec manual.....