i see this class of vessel as advanced sciences and cartography, particularly with sub-space, warp, and transwarp phenomena (as indicated by the non-standard deflector dish, paired engines, and hull-fin)
porbably diplomatic. it looks like something a dictator would cook up to look as elegant and different as possible. so i assume it's a 'taxi' for the president or something
i can't explain why ,but as i saw that ship when it was still a WIP (work in progress for those who don't know the abbreviation) i thought 'what an ugly thing' but now i love that model.
it was at scifi-meshes.com. in the forums it was the 3d-forum. i don't know if it's still there cause it has been a while since the model has been completed and released.