The fleet departure is, naturally, to pick up people.
After exploring the star map and confirming several optimal routes, the fleet can efficiently pick up people, at least ten times more efficient than before.
Previously, it took half a year just to explore three planets. Nowadays, a round trip might not even take a month.
This is also the usual method of interstellar exploration—
First, explore the star map with superluminal spaceships. Once the star map is illuminated, subsequent fleets can lay interstellar highways in advance or take shortcuts through pre-established interstellar passages.
After all, most civilizations have only light-speed spaceships; whether it's superluminal travel or teleportation through star gates, ordinary civilizations cannot afford such technologies.
This is Flying Level technology!
This is why most civilizations spend their entire lifetimes trapped within a single star system.
