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A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or other status ...
The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [ 1 ] The codes, developed during 1937–1940 and expanded in 1974 by the Association of Public-Safety Communications Officials-International (APCO), allow brevity and standardization of message traffic.
Code 3: Respond to the call using lights and sirens. Code 2: Respond to the call with lights only (rarely allowable by state statutes) Code 1: Respond to the call without lights or sirens. Some agencies may use the terms "upgrade" and "downgrade" to denote an increase or decrease in priority.
ISO 7010 is an International Organization for Standardization technical standard for graphical hazard symbols on hazard and safety signs, including those indicating emergency exits.
A law enforcement warning (SAME code: LEW) is a warning issued through the Emergency Alert System (EAS) in the United States to warn the public of criminal, and sometimes hazardous weather events that pose a threat to public safety.
Atmospheric ash plume advisories/warnings are also issued by the United States Geological Survey (Aviation Color Codes). Airport weather warning AWW – Addresses weather phenomena (including but not limited to surface wind gusts around or above 40 knots (46 mph), freezing rain, heavy snow or thunderstorms producing cloud-to-ground lightning ...
Diablo winds, known in the south state as Santa Ana winds, are seasonal for autumn and move warmer air from Nevada and Utah into California, drying out grasses and creating conditions that could ...
A civil danger warning (SAME code: CDW) is a warning issued through the Emergency Alert System (EAS) in the United States to warn the public of an event that presents danger to a significant civilian population. It is typically issued by a local or state authority and is relayed by the National Weather Service. The warning usually mentions a ...