Which system replaced the use of ten-codes in radio transmissions?

The National Incident Management System (NIMS) replaced the use of ten-codes in radio transmissions to create a standardized communication framework during emergencies and incidents. By adopting plain language communications, NIMS aims to enhance clarity and reduce the potential for misunderstandings among first responders, agencies, and jurisdictions, especially in multi-agency responses where personnel from different areas might be using different codes. This shift towards plain language ensures that messages are clear and accessible to all personnel involved, regardless of their background or training, thus improving overall situational awareness and effectiveness during emergency operations. The decision to move away from ten-codes was driven by the need for efficient communication in diverse settings, particularly when responders from different backgrounds and communication protocols must work together.