I'm currently in the middle of a patrol in the July '41. I've been patroling off of gibralter--actually just north of the canary islands. I've ran into 3 different lone Brazil steamers and one tanker. Also one portugues ship. Brazil is neutral until mid '42 I think.
Anyway, talk about a disapointment--finding a ship, working an intercept, and then when I'm in the perfect firing position I'm close enough to see that it's a neutral

. My crew is getting pretty sick of it. Hell, I almost blasted the last Brazillian ship just out of frustration.
J