The Marcus Arelius has two decks. The top deck has the bridge, staterooms, lounge, gym, galley and the small hold. The bridge and lounge are toward the bow. The owners stateroom and gym are next, followed by the passengers staterooms. Then the pilot's stateroom and the crew bunk room. The turret access (if installed) is located by the crew's bunk room. The lifeboats are accessed on the port and starboard sides in the middle of the passenger stateroom area. The lower deck includes the four large holds and the air raft hanger. Engineering is in a large open area in the stern of the ship (no top deck) with access to the jump drives, thrusters, contra-grav lifters and power plant. Fuel is stored all about the ship inside the hull.

The  Marcus Arelius has five cargo holds. Three are 20 tons, the forth one varies, depending on the options selected, from 10 tons to 16 tons. The four 20 ton holds are able to be sealed and used to carry extra fuel. Pumps and pipes are included to move the fuel from the holds to the normal fuel tanks and from the fuel tanks to the holds. This gives the  Marcus Arelius the ability to use some of her cargo space for extra fuel to increase the jump range in less heavily traveled areas of space.

The standard price does not include the multi-function turret. You can include this turret at a cost of 348 KCr. A bunk is provided for the gunner in the standard design even if the turret is not purchased. A missile magazine containing 6 missiles is normally included in addition to the turret, so if the turret is  installed the cargo capacity in the small hold is reduced by 3 tons (to 10std).  Changes to the ships statistics when a turret is installed are shown in blue.