Various local law enforcement agencies across the galaxy often relied on automated forces to supplement flesh-and-blood police officers and detectives, though very few wholly turn over such duties to police droids. On Coruscant, local police divisions would not be able to patrol the vast reaches of the planet-wide city without the use of Guardian police droids. Spaceport police droids were particularly popular in spaceports and deep space facilities, where organic crews are kept deliberately small to reduce the amount of life support supplies required.