Thanks, all.
I've downloaded a hard-copy of the ship recognition manual so I can pause and peruse at my leisure. As someone said, one person with more time == multiple people with less time.
I'll also give the flags enlighten mod a try. I really want to play with gray, wake-less targets -- the hunt is more than just targeting IMO.
Finally, thanks for the info on Integrated Orders, frau kaleun -- I didn't realize that it had nothing to do with radio messages!