Transport is a mission available to all fleets, regardless of the ships which comprise that fleet. A transport mission is simply that - your fleet will travel to the destination planet, offload any cargo it bears, then return to the planet of origin.

Missions
Expedition • Colonization • Harvest / Recycle • Transport • Deployment • Espionage • ACS Defend • Attack • ACS Attack • Moon Destruction

excluding fleets comprised of espionage probes