Great game so far. May have found a bug, or small over sight, but for the safe trade routes, if a ship is assigned it won't actually automatically restart a trade, or even work on it's current trade, if your flag ship is not on a trade. IE if it's docked, the progression bar for the safe trade ship won't progress, and unless you cancel it you can't upgrade it. Still thinks it's out to sea, when it's just chilling doing nothing somewhere.

Cheers!