Overview
Kar Duniash is the command anchorage of Battlefleet Ultima, the administrative heart of naval power across the largest segmentum.
Its dockyards and signal-basilicas coordinate wars separated by tens of thousands of light years.
Stranded in Nihilus, it has become less a headquarters than a lighthouse.
M41 and M42 status
Naval fortress; headquarters of Battlefleet Ultima.
Nihilus-side fleet bastion holding the eastern dark.
Timeline
Fleet command consolidates Ultima operations at Kar Duniash.
Tyranid war demands strain fleet allocation past doctrine.
The Rift cuts the anchorage from Segmentum Command.
Nihilus captains navigate by Kar Duniash's standing signals.
Cartographic positions and several administrative details are intentionally approximate where published Warhammer sources conflict or provide no canonical coordinate system.