What should be the first step when doffing the SCBA unit?

The correct first step when doffing the SCBA unit is to remove the left arm from the shoulder strap. This approach is recommended as it allows for a controlled and safe removal of the unit while maintaining balance and stability. By starting with the left arm, the wearer can effectively use their dominant hand (most people are right-handed) to manage the equipment's removal more easily, ensuring that the device is not accidentally dropped or mishandled.

Removing the left arm first also helps in reducing the risk of entanglement or injury, as the wearer can still maintain a hold on the unit with their right hand. Once the left arm is disengaged from the strap, the wearer can then proceed to unbuckle the waist strap or remove the right arm, continuing a systematic doffing process that prioritizes safety and efficiency. This sequence helps ensure proper control over the SCBA throughout the doffing process.