What is the primary function of the supply unit during an incident?

The supply unit plays a crucial role in managing the logistical needs of an incident, specifically by ordering, receiving, storing, and processing resources that are necessary for incident management. This function is vital for ensuring that all personnel involved in the response have the supplies and equipment they need to perform their duties effectively. By managing resources efficiently, the supply unit helps maintain the operational capability of the incident response, which is critical for the safety and effectiveness of the overall operation.

While the other functions described in the other choices are relevant to supporting an incident, they fall under different units or sections. For example, ground transportation and vehicle maintenance typically fall under the transportation unit, while determining food and water requirements aligns with the feeding unit. Similarly, recording the time for personnel and equipment is often the responsibility of the time unit within the finance/administration section. Thus, the specific role of the supply unit is distinctly focused on the logistics of managing resources, which underlines the correctness of the choice related to ordering, receiving, storing, and processing incident-related resources.