Forgive me for being sceptical, but wouldn't all the carried ships just bounce around inside, and worse, bounce against the inner hull and knock the ship off course? Surely the interior of the ship would be governed by the same laws as the exterior, and thus any attempts to have it "carry" ships inside would require the carried ships to also be cruising, in the same direction at all times, and beginning and ending at the same time to avoid crashing.
I am intrigued, but I'd love to know how this would work.