Moncton-class orbital weapon platform
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The Moncton-class orbital weapon platform (hull classification symbol: OWP) is a line of orbital defense platforms utilized by the UNSC towards the Insurrection and the Human-Covenant War and as well as in the years beyond.
The Moncton-class, unlike other models of defense platforms, was built with an on-board power source. As well as a fusion reactor, the lower stalk of the station was composed of stacked liquid-metal capacitors, which allowed for the rapid firing of its MAC so long as there is charge in their cells. If the reactor is damaged, the docking umbilicals could parasitically leach charge off a docked UNSC warship to power its weapon.
Moncton-class platforms are equipped with a 14D4A1 Magnetic Accelerator Cannon, a power-hungry 802.2 meter (2,632 ft) long coilgun that fires a ferric-tungsten round traveling at several kilometers per second, which carries enough energy to punch clean through a Covenant capital ship. The shell is accelerated by hundreds of asynchronous linear induction motors, which all line the barrel of the weapon. They were also equipped with seven M606 Goalkeeper point defense guns to protect them from enemy fighters, bombers and boarding craft.
Crew and Complement
152 UNSC Air Force and Navy personnel man Moncton-class platforms, all living within the cramped crew quarters on the station's ring section. This crew can include a number of senior officers who reside in an exposed command center, which can be modified with the equipment and facilities needed to coordinate entire defensive efforts around the planet at which they are stationed. For security, 136 UNSC Marines are stationed within security wings. These could be overwhelmed by Covenant boarding teams, provided enough of them are able to reach the station. For emergency evacuation, at least sixteen SKT-9 Bumblebees are stowed away in launch bays around the docking section.
To temporarily supplement their on-board complement, two purpose-built docking ports can be fitted on each side of the station, both of which can accept a UNSC frigate. Eight horizontally-articulated corridors can connect to airlocks to allow for the exchange of personnel.
In addition, multiple hangar bays can be fitted. During the Human-Covenant War, each individual station in a given battle cluster was optimized to accept a specific type of aircraft. One would be equipped to service light space fighters and utility craft, carrying up to ten F-41D Broadswords and D77-TC Pelicans. Another would carry interceptors such as GA-TL1 Longswords. The third is specialized towards D82-EST Darters and maintenance drones.
Introduced by at least 2517, several Moncton-class orbital weapon platforms along with another class, were utilized at Reach, where they were later destroyed along with its defending fleet in summer 2552 by combined Covenant naval forces under command of Thel 'Vadamee's Fleet of Particular Justice.
Numerous Moncton-class orbital weapon platforms among the three hundreds orbital defense platform formed part of Earth's orbital defense grid under the authority of Unified Ground Command by the UNSC Air Force and the Home Fleet. It was a key part of Earth's orbital defense grid, an ambitious plan that combined ground-based aerospace fighters, low-orbit satellites, and warship squadrons into a multi-layered integrated system. During the Battle for Earth, when the Prophet of Regret's Fleet of Sacred Consecration stumbled into Earth's defenses, Moncton-class platforms engaged the Covenant fleet at range, with Cairo serving as Lord Hood's command center to coordinate the defense of Earth, devastating the unusually small force despite the Covenant being able to board and destroy the Athens and Malta stations and slipping a single CAS-class assault carrier through the defense grid to deploy forces throughout Mombasa after exiting slipspace over the city.
The Moncton platforms would continue to defend Earth even as more additional Covenant fleets began to be dispatched to the Sol system and later when Prophet of Truth-commanded final overwhelming armada finally arrived in November. Despite particularly strong defenses, the final Covenant invading fleet overrun much of the orbital defense grid and the Home Fleet, thus presumably disabled or destroyed the mass of remaining orbital defense platforms as it was weakened by the previous Covenant fleets. However, it is likely that the orbital defense platforms destroyed the majority of the Covenant invading fleet in return. The Cairo remained intact, but left damaged after the final space battle. When the Forerunner keyship Anodyne Spirit jumped to Earth on November 17, Nassau Station tracked the Tykos 30 in Ruwan Ackerson's bloodstream to identify Harbinger of Piety as a priority target and destroy it, killing the Minister of Inquisition.
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