Quote Originally Posted by The_Emperor
Another way to blockade a port is to use an army and place it directly on the port... The result is the same as a naval blockade and will win you the mission.
Good tip!

Yeah, I've had those seemingly impossible missions too, then I got hip, and strategically placed ships at standby points capable of reaching anywhere within 5 turns.

Like everybody I ignore some Missions, but make sure that I complete more than I ignore.