Because of the size of an apparatus, as well as the clearance needed when backing, you should:

Assigning a spotter when backing a large apparatus is crucial for ensuring safety and improving visibility. Large fire apparatus can have significant blind spots, making it difficult for the driver to see obstacles or personnel behind the vehicle. A spotter can provide real-time feedback and guidance to the driver, helping to navigate safely and alleviate potential hazards that may not be visible in mirrors or through backup cameras alone.

This practice also enhances communication during the backing process, ensuring that the driver and spotter are coordinated and aware of their surroundings. While mirrors and backup cameras are helpful tools, they don't substitute for the additional level of safety that a spotter provides. Ultimately, the role of a spotter is invaluable in creating a safer environment when maneuvering large fire apparatus in tight spaces or busy scenes.