What would a dispatcher use to communicate in the field?

A dispatcher would use a walkie-talkie to communicate in the field because it allows for immediate, real-time communication over short distances, which is crucial in dynamic environments like dispatching. Walkie-talkies are especially effective in situations where rapid decision-making is necessary, allowing dispatchers and field personnel to relay information quickly without the delays that can occur with other forms of communication.

In contrast, email and mobile apps typically introduce latency in communication, which could hinder response times in urgent situations. While telephones provide direct voice communication, they may not be practical in all field scenarios, especially in environments where hands-free communication is beneficial or where conditions make using a mobile phone challenging. Thus, the preference for walkie-talkies in field operations stems from their robustness and ability to facilitate direct and swift communication.