M810 Helix point defense gun

The M810 Helix point defense gun, also known as AAA Helix gun or Helix System, is a United Nations Space Command starship-mounted point defense weapon. This autocannon can be found affixed to human capital ships during the Insurrection and the Human-Covenant War as late as the Battle of Psi Serpentis in 2543.

Overview
The Helix is a point-system employed for shooting down inbound threats such as strikecraft and missiles. They are described as being "spun up and hot", indicating that they are rotary cannons. As with most UNSC point-defence, they are likely automatically operated by an artificial intelligence.

Usage
Helix PDGs are primarily employed on the larger warships of the UNSC Navy, with their earliest known usage in 2473, with the introduction of the into service. They were employed on a handful of cruisers in the early 26th century, though have since yet to see any reintroduction on the newer fleets of the post-war era.

On at least the, the Helix can be interchangeably fitted with the M910 Rampart PDG. It is unknown whether this capability extends to the rest of the fleet - if so, the Helix may be additionally capable of being employed on the warships listed here.


 * Carriers
 * - 20x M810 Helixes


 * Cruisers
 * - Unknown
 * - 12x M810 Helixes
 * - 40x M810 Helixes (optional; can be replaced with M910 Ramparts)


 * Destroyers
 * Unidentified UNSC heavy destroyer - Unknown

List of appearances

 * Halo: Evolutions - Essential Tales of the Halo Universe
 * The Impossible Life and the Possible Death of Preston J. Cole