The Seeker and the Hunter were the first two ships of the New Aetherian Fleet. The fleet uses FTL with a Chronos energy amplifier as engines, but to move fastest they build immense portals through the dimension simply called the Infernal Realm. 

The smallest ships are two-passenger Sparrows, the largest are the Griffon and the Sphinx built for the singular purpose of destroying the Dark Dust Nebula with the O.L.F.A. super-cannons. 

Except from Allies and Enemies:  

The Pathfinder, Wanderer, Searcher, and Explorer are all moving supplies too big to go through the portals to other systems. 

The Seafarer and Sailor and the smaller Ospreys are moving supplies and people within our system. Those ships we cannot divert. The Hunter and the Seeker are only moving smaller cargo, when needed.

 The Tracker and the Archer are on their way back from Purgatory system tower removal.