Combat Categories and Ship Mission Bonus

Certain ship types and PDBs have been placed into categories that gives them bonuses against another category. This was added to the game system to promote the development of mixed fleets and defenses.

Ship Combat Categories

Ships of the Line (SoL)Dreadnought, Battleship
CruisersHeavy Cruiser, Light Cruiser
EscortsDestroyer, Frigate, Corvette
CivilianColony Ship, Small Cargo, Large Cargo, Salvage Ship
Civilian ships do not get any combat bonuses and are easily detected and destroyed. All other ship types have their own special missions and do not get combat bonuses. During combat, there is a chance that an escort class ship will intercede when a civilian ship is being attacked.

SoL get a to hit bonus against the Cruisers category.
Cruisers get a to hit bonus against the Escorts category.
Escorts get a to hit bonus against the SoL category.

PDB Combat Categories

As for PDB versus ships, while we don't have historical categories to draw upon, we have created categories similar to those for ships.
Heavy PDBOrbital Defense Base, Missile Platform, Quark Beam Artillery
Medium PDBDark Matter Battery, Plasma Cannon, Ion Cannon
Light PDBMicrowave Lance, Laser Cannon, Rail Gun, Defensive Satellite

SoL get a to hit bonus against the Medium PDB category.
Cruisers get a to hit bonus against the Light PDB category.
Escorts get a to hit bonus against the Heavy PDB category.

Heavy PDB get a to hit bonus against the SoL category.
Medium PDB get a to hit bonus against the Cruisers category.
Light PDB get a to hit bonus against the Escorts category.

Mission Bonuses for Combat Class Ships

The combat class of ships also add bonuses when performing mission types.
Recon ships get a fleet detection or avoidance bonus depending on their role.
Corvettes get a to hit bonus against all ships and PDBs while in Planetary Defense position. As an escort class ship, there is a chance this ship will intercede when a civilian ship is being attacked.
Frigates improve the rewards when on Raid operations. As an escort class ship, there is a chance this ship will intercede when a civilian ship is being attacked.
Destroyers will get a bonus by being the fastest combat ship. As an escort class ship, there is a chance this ship will intercede when a civilian ship is being attacked.
Light Cruisers improve the chances of ground combat during Genocide operations.
Heavy Cruisers improve the chances of ground combat during Invasion operations.
Battleships increase the chances for a fleet to hit a target during Bombardment operations.