The key element of casualty transport is that the casualty should not be further injured while being moved. In practice this means moving them as little as possible and keeping them in a neutral position. The various types of stretcher and backboard are designed with this in mind. The rescue tool pack shown in the rescue section also doubles a stretcher for moving casualties without spinal areas in confined spaces. The "yellow denim" overalls worn by personnel can also be improvised into a stretcher.

The scoop stretcher is used to move casualties without disturbing their spines. It splits in two so that it can be fitted around the casualty and then reassembled. The gap down the center allows an X-ray to be made of the back without removing the stretcher. It is not used to carry the casualty for any distance. For transportation it would be placed on another stretcher.
The standard stretcher used is known as the NATO or Furley stretcher. It has the advantage of being light and rolls up tightly for compact storage. The basic design probably hasn't chaned much in 100 years, but more modern synthetic materials are now in use to make cleaning easier.
The Headblock secures the head of the casualty to the backboard. It can also be used with the scoop stretcher.
This is an example of a plastic backboard. They can also be made out of wood, though the plastic tends to be lighter and easier to clean. The slots in the side are for carrying and for attatching the web straps. Backboards are used to immobilise the back and protect the spinal column of a casualty. If there is any chance that the casualty has sustained a spinal injury, a backboard will be used. They are used in conjunction with cervical collars. The casualty is secured to the board using a Spencer web. Head blocks are used to keep the head immobilised.
These are examples of the web system used to secure casualties to the backboard. The straps fasten with velcro through the handles on the board.