User:XW3 AR3 L3GION/NX-1000 250mm Railgun - Anti-Orbital Planetary Defence System

"I was manning one of the NX-1000's during the attack on Vitoria II, when a Remnant Cruiser came in through the clouds. I called it in and within seconds my entire battery opened up! We ripped holes in that mutha' and spent the next three hours watching it burn."

- Anonymous UNSC NX-1000 Gunner.

The NX-1000 250mm Railgun - Anti-Orbital Planetary Defence System, also known as the NX-1000 250mm Railgun and the NX-1000 AOPDS is a ground-based planetary defence system that utilises railguns to deter, destroy or cripple any enemy vessels that are in the atmosphere of an UNSC-held planet. While a single NX-1000 will simply be a thorn in the side of any capital ship, they are rarely alone - most standard NX-1000 batteries have at least fifteen Railgun's and can every NX-1000 can reload and recharge within 4 seconds providing that they have adequate energy.

The NX-1000 is on a 100 meter tall, 50 meter wide mount which gives 360 degree horizontally allowing the NX-1000 to turn to face targets and 90 degrees vertically allowing the NX-1000 to engage targets above and in front. The NX-1000 fires a 250mm, eighty ton ferric tungsten at 8080 kilometres per second. The NX-1000 is manned by three personnel, Commander/Gunner, Target Indentification and Engineer/Technician to operate efficiently.

Needing 300 megajoules to fire each shot, the NX-1000 relies on an external power source to meet its considerable energy requirements. Many NX-1000 batteries rely on several power sources to provide enough power, most have underground power sources but few have to take energy from the civilian energy network to fulfill its needs, causing blackouts in many cities.