Accuracy

Accuracy is a statistic that improves the chance of a successful hit by a weapon during ship combat. The chance of a successful hit is the of the attacking ship, minus the  of the defending ship, and is always at least 20%. The base of a weapon depends on its type, and various bonuses are available.

Accuracy by weapon type

 * : 80%
 * : 90%
 * : 100%

Thus, since bonuses are rare, it makes the most sense to pursue  bonuses when relying on  systems.

Bonuses to Accuracy
bonuses can apply to a single ship, a fleet, or an entire civilization.

Ship bonuses
removed ship components with bonuses.

Fleet bonuses

 * The Retribution and The Gestalt mercenary ships in

Civilization bonuses
Time Travelers can use the specialization to increase the accuracy of a single weapon type. Ancient civilizations can research to improve  across all weapon types.

Other bonuses:
 * The Sharp Eyed trait
 * The and  choices in Ruthless Vision galactic event
 * The choice in the Precursor Satellites colonization event in the Precursor Worlds DLC