Mobile fleet

A mobile fleet is a group of starship vessels, a fleet unit that patrols and explores on a mobile basis, with no set home base or return point. In the Federation's Starfleet, a number of mobile fleets explore planets and contact other races and cultures' homeworlds and colony worlds. 

Starfleet's standing fleets

 * Starfleet 8th Fleet
 * Starfleet 16th Fleet
 * Starfleet 20th Fleet