[THEBERBSTER]

A Warm Welcome To The Subsim Community > JanWolf
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The mission does not finish because you blew up the capital ships, all missions have a start date and a finish date.
This quite simply means you cannot dock your boat before the start of a mission and request it as it will not be there for you to see on your nav map.
All missions will disappear from your nav map at midnight on the last day of the mission and will only then show as completed.
It is not essential to request any mission the advantages of doing so is the promotion points gained by completing the ordered objectives.
In the case of your Breaking the Fortress even though you did not request this mission you still gained promotion points for completing the objective of sinking 1 capital ship.