The main shuttlebay in a Federation Excelsior-class starship variant, such as the USS Enterprise-B, was located across the rear of the primary hull. It was split into two sections, having a port and starboard side. (TNG movie: Generations; TNG reference: Star Trek: The Next Generation Sketchbook: The Movies) In the ST reference: USS Enterprise Owners' Workshop Manual, the main shuttlebay is labelled as being at the aft of the secondary hull where the cargo bay is located. The primary hull main shuttlebay is not depicted at all.