Deployable turrets are checked out of inventory stations and mounted in critical areas of the base to defend, like the entrace or generator room.
Inventories are critical to get deployable turrets, repair packs, and ammo! Like generators and turrets they can be destroyed and repaired.
Base turrets will auto aim and fire at enemies. They can be destroyed and repaired with a repair pack.
Generators are usually buried deep in the base and power turrets and inventory stations.
Early base rednering test, drop down to see a few turrets aimed right at you.