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The Morrigan-class is a class of patrol destroyer used by the Martian Congressional Republic Navy (MCRN), designed to be a low-cost combination of a patrol torpedo boat and a destroyer meant to be mass-produced and deployed on security assignments. It also is the smallest vessel employed by the MCRN. Some were modified with stealth capabilities. While smaller and cheaper, it was still designed with top of the line equipment and capabilities, allowing the ship to take on other vessels out of their weight to some degree.


The battle damaged Kittur Chennamma being boarded by the Rocinante.

The Morrigan-class was introduced in the MCRN during a fleet-wide modernization program that included the Donnager-class battleship and Corvette-class light frigate. To overcome the numerical superiority that the U.N.N. has over the MCRN fleet, the Morrigans were purposefully made small and cheap to maximize the number of destroyers that could be built and deployed, though not so much as to sacrifice its quality.

Ships of this class and Corvette-class frigates are able to be stored in Donnager-class battleships, with 12 Morrigans capable of being stored in a single Donnager-class.

The Damascus, Iceni, Avalanche, and Hamill-Stewart were all used in Operation Silent Wall, in which Captain Theresa Yao and the Donnager used the ships during their anti-pirate campaign in the belt. None of those ships would make it back to their mothership, as it was destroyed before they could properly be recalled.

In "Rock Bottom" the Scipio Africanus boarded a Belter prospector ship Xinglong and was later attacked by it. The Xinglong was unable to damage the ship, and the Scipio Africanus retaliated by firing a missile that destroyed the prospector ship. By the time Fred Johnson accused the United Nations (UN) of constructing the stealth ships, the Africanus was to be stationed at the Cronian (Saturnian) moon, Titan.

After Eros impacted Venus, the Shandian, a modified vessel of this class, equipped with stealth capabilities, shadowed the UNS Arboghast until it disappeared.

Another of the Morrigan-class, the Kittur Chennamma, was found derelict and heavily damaged by the crew of the Rocinante, where they scavenged the ship for supplies after running low on PDC (Point Defense Cannon) rounds and torpedoes. There, the crew also discovered and rescued survivors inside of the ship. After a failed ship takeover by the survivors, the crew of the Rocinante repaired the Kittur Chennamma enough to be able to make it back to Mars, where the MCRN Hammurabi picked up the survivors and left the wreck of the Morrigan-class adrift, as it was too damaged to make full repairs cost efficient.

At least two Morrigan-class vessels were handed to the Free Navy by defectors in the MCRN. A Morrigan-class destroyer was used by Filip Inaros, son of the Free Navy's commander Marco Inaros, during a material exchange in the Mariner Valley Shipyard, and was seen escaping the site following the detonation of a bomb there; it is unknown if this ship is the same ship later seen in the Free Navy's command fleet.

Multiple Morrigan-class patrol destroyers were present in the Martian breakaway fleet that would eventually establish the Laconian Empire.

At least one MCRN Stealth coated[2] Morrigan-class patrol destroyer was present and destroyed in the First Battle of Medina station. Several more took part against the Free Navy's retreat to the Sol Gate on both sides.


Starboard profile view of the Morrigan-class.

The Morrigan-class is 31 meters long, small enough to fit inside the internal hangar bays of a Donnager-class, which makes it ideal for complementing a small flotilla. It is very compact in that two Morrigan-class patrol destroyers could fit into the hangar space which one Corvette-class frigate occupies. In order to fit two Morrigans, however, one ship on each platform was required to be docked inverted via ceiling clamps.

The ship lacks a ventral PDC, which creates a hole in its defense grid. This forces the Morrigan-class to rely on its maneuverability or other ships to cover this side.

2 Morrigan-class patrol destroyers and 1 Corvette-class light frigate docked in a Donnager-class hangar.

They were known to amass together, acting as a large flotilla, presenting any ship as fast, deadly, & numerous opponents. Due to these characteristics, the Morrigan-class stands as a notable exception to the MCRN preference for overcoming disparities in total fleet size by maintaining a technological edge in ship design.


  • Territorial patrol
  • Customs inspection
  • Fast attack


  • 6 crew cabins (2 for officers, 4 for enlisted)
  • 1 medical bay with 2 beds, automated instruments
  • Space for up to 180 tons of cargo
  • MCRN standard tight-beam communications system
  • MCRN standard targeting suite
  • Radar-reflective stealth panels (certain craft only)
  • Heat sinks (certain craft only)

Known Ships[]

Designation Photo Appears Notes
MCRN Ambedkar S01E07ambedkar-34m01s.jpg Season 1 (TV) Attempted to board Rocinante.
MCRN Avalanche (TV lore)[3] Part of Operation Silent Wall.
MCRN Cú Chulainn Morriganclassdestroyer2.png Season 2
Season 4 (TV)
Kept hidden in the shadow of a moon of Jupiter during the UN-MCR War.
MCRN Damascus (TV lore)[4] Part of Operation Silent Wall.
MCRN Hamill-Stewart (TV lore)[5]
MCRN Iceni (TV lore)[6]
MCRN Kittur Chennamma S03E05kcabandoned-3m38s.jpg Season 3 (TV) Heavily damaged and eventually abandoned during UN-MCR War.
FN Koto S05E10Koto02m34s.jpg Season 5 Stolen and provided to the Free Navy by rogue MCRN forces. Later disabled by two railgun rounds from the Rocinante.
MCRN Morrigan (TV lore)[7] Namesake of the class.
MCRN Scipio Africanus S01E06scipioafricanusfliped90degrees-14m06s.jpg Season 1 (TV) Damaged by Belter rock flinging attack.
MCRN Shandian MCRN Destroyer.JPG Season 2 (TV) Modified with stealth panels. Eventually disassembled by the Protomolecule over Venus during the latter stages of the UN-MCR Cold War.



  1. The Expanse TV Series - Season 1, Episode 7: "Windmills"
  2. The Expanse TV Series - Season 6, Episode 4: "Redoubt"
  3. Spacedock Morrigan-class video:
  4. Spacedock Morrigan-class video:
  5. Spacedock Morrigan-class video:
  6. Spacedock Morrigan-class video:
  7. Spacedock Morrigan-class video: