Which of the following is NOT commonly included in officers' communication equipment?

Vehicle navigation systems are typically not regarded as standard communication equipment for law enforcement officers. While these systems can be very helpful, their primary function is to assist in navigating from one location to another rather than facilitating direct communication between officers, dispatch, or other units. In contrast, portable and mobile radios, department-issued cellphones, and mobile data terminals (MDTs) are integral components of effective communication systems in law enforcement.

Portable and mobile radios enable real-time voice communication, which is essential for coordinating responses, requesting assistance, and sharing information quickly during operations. Department-issued cellphones allow for versatile communication methods, including voice calls, texts, and access to emails or other applications that can help officers stay connected. Mobile data terminals provide officers with access to critical information such as databases, incident reports, and real-time data, contributing to situational awareness and decision-making in the field.

While vehicle navigation aids can enhance an officer's ability to reach their destination, they do not serve the same communicative function as the other tools mentioned, making them less essential to a police department's communication arsenal.