Dahak is the name of a planet-sized starship in the Mutineers Moon, the Armageddon Inheritance and Heirs of Empire (all collected in the omnibus volume, Empire from the Ashes) books by David Weber.

In these books, the moon of Earth turns out to have really an ancient battleship (a Utu-class planetoid, of an ancient star empire known as the Imperium) in orbit around the Earth with a full-strength crew a quarter-million strong, a normal sublight parasite strength of two hundred warships. Its crew was stranded on Earth thousands of years ago, due to a mutiny led by the Chief Engineer Anu of the ship; Anu's people had grown weary of being in Battle Fleet and wished to find a congenial remote planet on which to live out their lives. The mutiny fails (but not before crippling Dahak), and all crew members are evacuated to Earth.

The crew is the source of humanity on earth; the mutineers using ambitious and greedy people to achieve their ends from their base of operations under Antarctica, while the loyal crew members use those who are trustworthy and willing to fight to help save their planet from both the mutineers and oncoming threat of the Aku'Ultan, a maurading race of sentient beings hell-bent on destroying any race that may eventually pose even the slightest threat to their existence. The ship lay dormant for most of this time. Dahak is also the benevolent sentient (acquired independent thinking ability, thus a real sentient entity) computer core of the ship featured in this series. Dahak is like the many ships named Enterprise in the United States Navy and is the eleventh and there have been twenty-third ship to bear the name.

Mobile units

Dahak also has multiple sublight parasites

Sublight battleships (each have 6 Fighters, 6 Assult Shuttles, 2 Pinnaces (Command shuttles) and 6 heavy tanks)

*Shirhan

*Escal

*Nergal

*Osir

Sublight cruisers

Sublight destroyer

*Ardat

Sublight transport

*Bislaht

*Cardoh

*Transhar

and Four Fleet repair units, each effectively a hundred-fifty-thousand-ton spaceborne industrial complexe, which is a clanking replicator.