As the game progresses you will need a ready supply of hundreds of units of flak supporting your main battle fleets. The role of primary guns is to prevent the fleet from being outgunned by heavily shielded enemy units. They are important in the Core Battle and especially in the Final Exchanges when they may be the only units capable of finishing the enemy. The core of the fleet, whose role is to quickly clear away all but the most heavily shielded units. Multi-Secondary gun units can be very effective against a lightly screened enemy force.
Secondary guns operate in the Core Battle and, if mutli-gunned, the flak clearance phase.
Deploying sufficient tertiary guns to deal with enemy flak is the key to lowering casualty rates. Primary Guns Primary guns are typically mounted on large warships of mass 99 or greater. Multiple secondary armaments are common on larger ships. There most common occurrence is on larger ships in very large multiple installations. From time to time peculiar situations arise which can be exploited using special ship designs.