Thanks Rudewarrior,
I really appreciate the explanation and rationale. I pity the real life Kaleuns trying to make sense of the orders whilst also trying to identify the ships at night, in bad weather and without getting themselves killed!
You are of course correct, I was confusing the Pan-American and American safety zones.
There is a perverse satisfaction in locating and pursuing a ship only to discover it is not a valid target!
The mod is brilliant.
Thanks again.
Vermin