Which unit is exempt from using the on-scene button on the MDT?

The first arriving unit is exempt from using the on-scene button on the Mobile Data Terminal (MDT) because this unit typically has the responsibility of assessing the situation upon arrival at an incident and coordinating the response. The first arriving unit's primary objective is to quickly evaluate the scene and manage resources effectively, so they may not have the opportunity to engage with the MDT functions at that moment.

In contrast, other units, such as medical or support units, typically arrive later and can utilize the MDT features to communicate effectively and ensure a coordinated response. This allows the first arriving unit to focus on their immediate duties, securing the scene, and beginning incident management without the added task of using the on-scene button initially. The distinction is important for maintaining efficiency in emergency response and ensuring that the most urgent tasks are prioritized.