Combat ratings in Merchant Empires are dynamic values. They are calculated using the following formulas:

• Attack Rating = Potential Damage / 40 + Combat Drones / 50
• Defense Rating = (Shields + Armor + (Combat Drones * 3) / 100

Potential Damage is the attack value of every weapon on a ship. Note that the damage done by plasma boosters is ignored here, and also that only the highest damage done by a weapon is used in the formula. Example: for a 80/90 (shield damage/armor damage) cannon, only 90 armor damage would be included the attack rating, not the sum of both damage values.(