FM/BG-129.V1.00 - Common terminology for vehicle identification
- Auto-cannon: an automatic gun with a caliber between 20-60 mm
- Cannon: a gun bigger than an auto-cannon
- Direct fire: firing a weapon within the line-of-sight of the user of the weapon in a (relatively) flat trajectory
- Indirect fire: firing a weapon outside the line-of-sight of the user of the weapon
