Down in the mostly empty Hangar Bays, a sealed off arena has been prepared for martial combat. It is kept large enough to hold two Astartes at any time but can be made larger or smaller upon request. The area is kept dark, with the only illuminators focusing on the arena itself. The ground inside the fighting area is only slightly softer and more giving than the hard adamantine and plasteel hull of the Doomsayer. A ring has been drawn into the ground in an octagonal shape, but there are no walls or fences. Honor and pride will keep the combatants in.
Incense burns from the walls and a small medicae facility has been set up on one of the far walls.