What does "10-20" refer to in radio communication?

In radio communication, "10-20" is commonly used to refer to a specific location or to inquire about someone's location. This phrase is part of the ten-codes, which are standardized codes used by law enforcement and other groups to convey information quickly and efficiently over the radio. When someone uses "10-20," they are essentially asking or providing information about where they are or where something is happening, making it a crucial code for situational awareness in the field.

Understanding this code is important for effective communication, especially in emergency services or during operations where knowing the location of personnel and resources is vital.