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Class overview

Actium-class super-heavy frigate


SinoViet Heavy Machinery


United Nations Space Command

Preceded by

Paris-class heavy frigate

General characteristics

Super-Heavy Frigate


590 meters


389 meters


353 meters

Slipspace Drive



100-120cm Titanium-A battle plate


Block I

Block II

  • 200 Marines
  • 75 Orbital Drop Shock Troopers
  • 10 D77-TC Pelicans
  • 50 SOEIV drop pods


Additional information

Human-Covenant War


The Actium-class super-heavy frigate, or simply known as the super-frigate, is a class of frigates developed during the Human-Covenant War. Known for being the single heaviest class of frigate ever produced, the Actium was an experiment as part of the Centimane Project, a naval program to produce capital ships capable of combating the Covenant on more equal terms.


In terms of design, the Actium was essentially a scaled up and upgraded Paris-class heavy frigate. It was more than twice the mass of one, being fifty-five meters longer and one hundred ninety meters wider. Basically, it was two Paris put together side by side, though technically speaking, it was much more than that.


Hull and Propulsion

Crew and Complement

An Actium-class super-heavy frigate is crewed by five-hundred thirty-seven crew members. It is capable of supporting a complement of two-hundred Marines and seventy-five Orbital Drop Shock Troopers.

Its small hangar bay could hold ten D77-TC Pelican dropships. Its deployment bay could launch fifty Single Occupant Exoatmospheric Insertion Vehicles to deploy ODSTs.


The Actium is impressively armed for a ship that was technically classified as a frigate, capable of punching well above its weight. Its primary armaments consisted of two heavy-coil Magnetic Accelerator Cannons mounted side by side of each other. Secondary armaments were sixty M58 Archer missile pods, fourteen 11A2R1 naval coilgun batteries located across the hull, replacing the twelve naval coilguns found on the Paris, and two Mark 33 Spitfire coilgun batteries on the top and bottom of the hull. Point-defense was provided by eighteen M870 Rampart point defense guns.

Unfortunately the Spitfire batteries proved to be too much of a drain on the ship's power supply and would be removed for the second block, replaced with four M66 Sentry autocannon turrets instead.

Operational History

Known Ships of the Line

 Name   Hull Classification Symbol   Commissioned   Notes 
UNSC Actium AV-1 January 3rd, 2534 Lead ship of the class.
UNSC Octavius AV-2 January 5th, 2534
UNSC Vetus AV-53 January 5th, 2534
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