The main factor that influences the techniques for Air Marshal Security is the airplane’s shape and environment – a narrow, tube shaped space. Krav-Maga is very useful in this situation, especially since using firearms on an aircraft is very dangerous and should be used only as a last resort.
Using the aircraft’s seats to aid the Air Marshal.
Rescue and hostage situation.
Like the Air Marshal, the Sea Marshal has to act alone in a closed perimeter. However, he has to deal with threats from outside the craft when docking, he must protect the passengers from each other and from terrorist threats, and he may use firearms. A Sea Marshal’s job is psychologically very taxing – he and his crew must work alone (with no backup) and away from civilization for long period of times.