The starbase will unload incoming ships. It will unload all ships to which the planet is friendly: your own ships, ships with matching friendly codes, and ships whom you have offered the planet level of alliance, including cloaked ships.
This mission will unload Tritanium, Duranium, Molybdenum, Supplies, Colonists and cash. It will not unload Neutronium or ammunition.
Relevant PControl Stage: BaseMissions_2