A Roaming Fleet is a Subdivision of Starfleet .
A Roaming Fleet is responsible for exploring unknown space, dealing with weirdness, making new friends and Boldly Going Where No One Has Gone Before. It replaces sub divisions of the old Galactic Exploration Command
Ships in a Roaming fleet will tend to go all over, the fleet designation is more a book-keeping convenience than an actual organizational reality.
As opposed to Standing Fleets
Borrowed from LUG and then developed.