Also relevant to the last post are the cargo and habitation sections:
The cargo holds aren't quite as spacious as a TTV, but can carry plenty of cargo for settlements. Also, each has a Tsar dock on its outside (the only bp editing on the ship, courtesy of TtTOtW), so it can handle shipments from those as well.
Each section has its own features too. The bottom section holds long-range comms equipment, as well as parachute packs which can land a fully fueled Pyrotechnic on almost any body with an atmosphere (I think Mars is the one exception). The top section has a different purpose. It's designed to carry defenses, protecting the ship from the occasional threat.
The middle section is filled with 14 habitation balls (yes
8bitCosmonaut, Pathfinder loves balls...), each housing two people, giving the ship a personnel limit of 28 for long term housing.