![]() The nature of the call is an aggravating factor when deciding when to use them. The use of lights and sirens is up to the individual police officer driving to the call. ( January 2010) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. ![]() Please help improve this section by adding citations to reliable sources. NIMS also strongly encourages the use of plain language for internal use within a single agency. The National Incident Management System (NIMS) states "it is required that plain language be used for multi-agency, multi-jurisdiction and multi-discipline events, such as major disasters and exercises", and federal grants became contingent on this beginning fiscal year 2006. Some emergency medical services use "Priority" instead: In this example, to "reduce code" would mean to continue responding, but at Code 2 or Code 1, rather than discontinue altogether. For example, if multiple units are responding Code 3 to a call, but the units already at the scene have mostly resolved the situation, the scene units may request that the responding units "reduce code". The term downgrade may be used in the opposite situation.Ī similar variation, generally used by units instead of dispatchers, is to "increase code" and "reduce code". For example, if a police unit is conducting a Code 1 response to an argument, and the dispatcher reports that the argument has escalated to a fight, the unit may report an "upgrade" to a Code 3 response. Some agencies may use the terms "upgrade" and "downgrade" to denote an increase or decrease in priority. Additionally, some agencies use "Code 99" which means for all units to respond, typically used in bomb threats, active shooters, hostage situations, and other high-level situations. For example, in the Los Angeles Police Department's radio procedures, Code 1 is not a response code, and its meaning is transferred to Code 2, the original meaning of which is transferred to the semi-official response code "Code 2-High". The term "Code 4" is also occasionally considered a response code, though it generally only means "call has been handled or resolved, no further units respond".Ĭertain agencies may add or remove certain codes. ![]() Code 1: Respond to the call without emergency lights and sirens.Alternatively, sirens may be used if necessary, such as to make traffic yield or when going through intersections. Code 2: Respond to the call with emergency lights, but without sirens.Code 3: Respond to the call with using lights and sirens.They generally vary but often have three basic tiers: In the United States, response codes are used to describe a mode of response for an emergency unit responding to a call. Response codes vary from country to country, jurisdiction to jurisdiction, and even agency to agency, with different methods used to categorize responses to reported events. ![]() A police radio dispatcher's desk from the NetherlandsĮmergency service response codes are predefined systems used by emergency services to describe the priority and response assigned to calls for service. ![]()
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