The belly of The Behemoth is a single large cargo area that is 65 feet long and 50 feet across. The ceiling is only 9 feet high, which seem claustophobically low given the depth of the room. Well packed, the main hold can carry 300 tons of cargo. Even though they are reminiscent of a parking ot, the lines on the floor are just guides to help with inventory tracking. At the forward end of the hold are a pair of heavy bay doors. These slide open to allow access to the air lock beyond. The exterior door on the other side of the lock lowers to act as a ramp. There is also a personnel hatch (with standar couplings) that can be accessed from the lock area. It leads down out the bottom of the ship and up to the passenger deck. When grounded, the exterior hatch is not usable. Note that the main doorway is just high enough to allow a shuttle into the hold, though doing so while in flight would be extremely risky (and would also mean venting the entire hold to space).

A step up from the main hold brings one into the aft cargo area. From here stairs lead up, through a pressure door, to the passenger lounge. There is room for up to 30 tons of cargo in this area. There are also small "vaults" (reinforced closets with electronic locks) along either wall - four on each side. There are used to transport sensitive goods and passenger valuables. A few of these units also have environmental controls built in.