Confederation Navy: Solomani Rim Sector Fleet
So I was working on the Hilfskreuzers concept to bridge the gap between heavy cruisers and frigates, which was basically a commercial hull and a surplus/used twenty five hundred tonne jump module, and then I recalled you still have tenders and tankers, that in theory you'd use as a starting point.
I couldn't find any examples of tankers or tenders in the Imperium Navy, though the twenty thousand tonne Servant and fifty kay tonne Washington classes were described for the Solomani from the Rim War.
It's not something you usually pay attention to when constructing the order of battle, but they tend to get a prominent mention when detailing navy squadrons, without really describing them.
What is the appropriate size and how would you employ them?
Performance would be a given at seven gravities and four parsecs, since a mobile strategy would require the vulnerable auxiliaries to remain behind the battle line and keep up with the fleet, instead of being sitting ducks that the fleet commander would be forced to detach and keep far away.
That would make them fast fleet tankers and fast fleet tenders, which would be specifically constructed to navy requirements, and would be manned by Confederation Navy personnel, compared to slower and probably much smaller auxiliaries.
And of course, you might as well construct as hundred thousand tonne light spheres, since you only get one or two of them at a time per squadron.
There is no mention of camels or dromedaries, so I''ll go with the fact that both are highly specialized, at least in the case of the fast fleet tanker, whose primary mission is to secure hydrogen and has it's own fleet of fuel shuttles; in an emergency, can go and skim a gas giant. While never unescorted, would have extensive armament deadly to fighters and smallcraft.
The tender would pick up the slack for everything else, stores, ammunition, spare parts, repairs, hospitalization, entertainment, spare crew, command ship, communications relay, some intelligence gathering, ad hoc (Marine) assault platform and escort carrier.