The AD-00N class of "mobile unmanned anti-satellite assault craft". An underside bay holds four nuclear missiles. A large block of five gimballed thrusters at the back allows it incredible forward thrust, with reaction-control for manoeuvrability. The Lunar Republican Orbital Guard deployed these craft in 2159 and manufactured an incrementally improved line of them through to the end of the Interplanetary War. The UNSF responded with dedicated manned "space warships" designed to combat these "torpedo boats", which escalated into an arms race. The craft use a mix of liquid coolant and retractable wing-like radiators to cool its high-performance reactor and thruster system. This, along with its use of liquid helium propellant mined from the Lunar surface, gave it unparalleled performance and logistical economy in the 2160s and 2170s as a weapon system.
A variant was designed with modified missiles that were meant to be used as orbital bombardment munitions, both nuclear and kinetic impactors. While much-speculated upon by UN analysts after its discovery in 2166 by UN espionage agents, it was not deployed by Lunar forces. However, Lunar allies during the Interplanetary War made potent use of such devices during the bombardment of Earth.
Manufacturer: McGrady Aerospace
Rollout: 2159
Service: 2160 to 2197
Length: 60 meters
Mass: 90 tons dry; 200 tons full
Materials: aluminium, carbon fibre
Powerplant: nuclear reactor, 14000 kw
Propulsion: 5x nuclear thermal rockets, 250000 kg forward thrust
Propellant: 80 tons liquid helium
Armament: four nuclear missiles; 1x underside hardpoint for added four-missile block.