United Sol Fleet
The United Sol Fleet is a multi-national fleet of starships built by the nations of Planet Earth, as part of a joint effort between them and the Brayburn Society to help the remainder of humanity, namely those humans who are not part of the Society, to gain the necessary technology and experience required to become a functioning, and respectable member of the galactic community. The ships of this fleet, completely unique in their design, are built using older, obsolete technology long since abandoned by the Society, and yet considered revolutionary by the people of Earth, serve as a training grounds for this purpose. These ships, combined with the Society Joint Commerce Station, serve as a training grounds and one of several well planned and purposeful baby steps that Earth will be required to take as they prepare to make much bigger steps out into the wider universe at some point in the future.
The ships themselves are not FTL capable, as such technology is not currently needed, since they will not be leaving the confines of Sol Space for some time to come, but they do sport very powerful sublight drives that can accelerate the ships upwards of 3/4 light speed. The first group of these ships built, known as the Aquarius class, named after the first purely Earth built starship by the same name, sports basic energy shielding (for protection against navigational hazards and other things that might threaten the safety of the ship), temporal shift abatement (to neutralize the temporal effects of sublight travel), inertial dampeners, and several other technologies important to deep space navigation. The ships, however, do not enjoy some benefits of Society and Earthfleet vessels, such as Fluidic Armor, or even the advanced allow technologies employed in earlier ships. Instead, their hulls are made from stainless steel, which is both strong, and doesn't suffer the same issues as other metals or allows when exposed to very low temperatures.
When first built, the ships were decried for their lack of an FTL drive. However, given that travel by these ships would be primarily limited to just the space inside the Sol Perimeter, such technology was not needed as a typical Aquarius class starship can cross the entire 40 AU breadth of our solar system in just under eight hours. So, while FTL flight within Sol is helpful for speeding transit from one place to another, it's not required.
