Ship Cannons are craftable structures in ATLAS. Ship cannons are the first 'real' artillery available to new Pathfinders. To craft ship cannons you must unlock the Artillery discipline tree, and learn the skill: Cannon Studies Ship Cannons can be loaded with the following types of ammo: Medium Cannon Ball Spike Shot Bar Shot The Ship Ammunition Container can be used to automatically feed new ammo into cannons if placed on the same ship (ideally below deck) as the artillery structure. When Placed
Epoch-class heavy carrier - Ship class - Halopedia, the Halo wiki
Ships - Official ATLAS Wiki
Manned Ship Cannon - Official ATLAS Wiki
ATLAS - Official ATLAS Wiki
ATLAS - Official ATLAS Wiki
Ship Resources Box
Artillery - Wikipedia
MS GNV Atlas - Wikipedia
Kraken - Official ATLAS Wiki