When evacuating an unconscious casualty with an M1114 vehicle, what should be used to secure the casualty?

Using a long spine board to secure an unconscious casualty during evacuation is crucial for several reasons. First and foremost, the spine board provides stability and support to the casualty's entire body, particularly the spine and neck, which is essential if there's a possibility of spinal injury. Securing an unconscious individual requires a method that both immobilizes them to prevent further injury and facilitates effective transport.

In addition, a long spine board allows for better management in a confined space often found within military vehicles like the M1114. It can be quickly secured within the vehicle, permitting safe transport to a medical facility. Furthermore, it enhances the ability to monitor the patient's airway and provides a flat surface for any necessary interventions during the evacuation.

Other options, while they may have their benefits in certain scenarios, do not provide the same level of immobilization and support essential for an unconscious casualty.