What additional feature does a backboard have to assist medical personnel during transport?

The additional feature that a backboard has to assist medical personnel during transport is hand holds and belts for securing the patient. These features are crucial for ensuring the patient's safety and stability during movement. Hand holds allow medical personnel to grip the backboard securely, facilitating easier lifting and maneuvering, particularly in emergency situations. The belts are essential for securely restraining the patient to the board, preventing any further injury and ensuring they remain in a stable position while being transported, especially if they have suffered a spinal injury or are unconscious.

The other options, while they may have their own benefits, do not specifically enhance the primary function of the backboard in an emergency medical transport scenario. For example, while comfort pads can improve patient experience, their primary purpose is not related to securing or stabilizing the patient during transport. Similarly, the weight of the backboard may impact handling, but the key features that ensure the patient's safety and security are the hand holds and belts. Lastly, the ability to float is not typically a standard feature in all backboards and is less relevant in the context of securing and transporting patients effectively.