Any starship with the Stackable ability may perform the Stack Ships mission. The following requirements must be met:
When the starships are stacked, they create a single starship with the combined mass, crew, fuel, cargo, fuel and weapons capacities of the original starships. The starships that can be created with this mission can be found here.
If one of the original starships has torpedo tubes and the other has fighter bays, the bays are discarded. If the stacking is performed at a starbase, and the starbase has adequate torpedo tubes of the same type in inventory, the fighter bays will be replaced with torpedo tubes.
If only one stackable starship is present at a location, this mission is not visible in the starship's mission list.
This mission can't be reversed at a later time.
See also: Out of Fuel.