What form is used to order an item through the supply unit?

The correct form used to order an item through the supply unit is the OF-294. This form is specifically designed for the purpose of ordering supplies and equipment during incidents. The OF-294, titled "Requisition," provides all necessary details such as the items requested, quantities, and required delivery dates, ensuring that the supply unit efficiently processes the request.

While the ICS 213 (General Message) can be used for various types of communication within the incident management system, it is not intended for specific supply requisitions. Instead, it serves a broader purpose of conveying messages that may not be related solely to supply orders. Understanding the distinct functions of these forms is crucial for effective incident management and ensuring that requests are processed accurately and promptly.