Originally posted by NeoHunter
Gives me the impression that it contains advanced sensor equipment in those...rings and that its sole purpose was for recon and not combat.
I never got that impression, but I guess I can still give an excuse... The GTVA needs more advanced sensor arrays on fighters/bombers for operations in a nebula theatre, as it had been decided that AWACS were too vulnerable, and a chained array of fighter/bomber advanced sensors would be both cheaper and more readily deployable.
Hence the shape, the very outer edge of the ring (where no secondaries would fit anyway) is given over to these sensors. Or something ^_^