Signal 4 indicates which scenario?

Signal 4 specifically indicates a scenario of "Out of service; equipment failure." This means that a unit is unable to operate due to issues related to its equipment, which could involve mechanical problems, technical malfunctions, or other operational failures. Recognizing this signal is important for understanding the status of patrol units, as it informs dispatch and other officers that the unit is not available for responding to calls or engaging in law enforcement activities until the equipment issues are resolved.

In contrast, other signals represent different circumstances. For instance, being "Out of service; subject to call" reflects a unit that is unavailable for standard duties but may be available to respond if needed, while "In service" indicates that the unit is fully operational and able to respond to incidents. The option referring to a "Discharge of firearm" relates to a serious incident and carries a different set of implications for law enforcement procedures and responses. Understanding these distinctions helps officers and dispatch efficiently manage resources in law enforcement operations.