Donning SCBA from a seat mount should only be done if:

Donning a Self-Contained Breathing Apparatus (SCBA) from a seat mount should be accomplished without removing the seatbelt to ensure the safety of the firefighter during the process. Keeping the seatbelt on minimizes the risk of injury from sudden stops or accidents while the vehicle is in motion, playing a crucial role in maintaining the emergency responder's protection.

The focus on safety and efficiency underlines the importance of quickly transitioning into gear while still being restrained in the vehicle. Other options, such as donning while moving, the unit being turned on beforehand, or having sufficient space in the cab, do not prioritize the critical safety aspect that maintaining the seatbelt provides during this preparation phase. This reinforces the importance of adhering to seatbelt protocols, which is integral to emergency vehicle operation and firefighter safety.