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The Donnager-class battleship[1] is a class of Martian Congressional Republic Navy (MCRN) battleships–named after the lead unit of the class–the MCRN Donnager. Donnager-class battleships are almost 500 meters long and about the same size as a 130-story office building; the ships measure about 250,000 tons dry weight.[2] Donnager-class battleships are some of the largest and most capable ships in the MCRN; they frequently serve as flagships for MCRN fleets, and are large enough to carry smaller missile frigates or escort corvettes such as the MCRN Tachi, now known as the Rocinante.

Technology and combat characteristics Edit

Donnager-class battleships are one of most advanced ship types in the MCRN and the solar system. These dreadnoughts are also able to carry small missile frigates or Corvette-class in the hangar bays. A Donnager-class ship is roughly 500 meters (1,640 feet) in length, which is equal to or the same size as a 130-story building, and its mass is around 250,000 tons dry weight. This class is equipped with an Epstein Fusion Drive which doubles as the main engine.

Each ship is armed with four torpedo launchers, an unknown number of PDCs, and two Rail guns. The torpedo launchers are in a fixed position in the nose of the ship and an unknown number of torpedoes are carried, each equipped with a plasma warhead. The Point Defence Cannons (PDCs) are positioned all over the battleships, and are tasked to shoot down incoming torpedoes or missiles from armed ships–whether they're United Nations Navy or pirates. The rail guns are on the starboard and port side of the ship for use in Close Quarter Battles (CQB).

Please note that rail guns accelerate a conductive armature, or the receptacle which directs the projectile, along parallel rails by placing huge current demands on the ship's power system. Gauss cannons, on the other hand, accelerate a ferromagnetic projectile with electromagnetic fields, aka coil-gun. It is also known as a mass driver or a kinetic-energy weapon.

Layout Edit


History Edit

The Donnager-class is considered to be among the third generation of ships produced by Mars.

Ships of the line Edit

Designation Class
MCRN Donnager Donnager-class battleship
MCRN Harman Dae-Jung Donnager-class battleship
MCRN Bellaire Donnager-class battleship
MCRN Bandon Donnager-class battleship (presumed)
MCRN Barkeith Donnager-class battleship




The Expanse MCRN Donnager Class Battleship - Spacedock

The Expanse MCRN Donnager Class Battleship - Spacedock


  1. Caliban's War, Ch. 8 Bobbie
  2. Leviathan Wakes, Ch. 11