Before revision: An External Vision System (XVS) refers to any of several methods to provide the pilot of an aircraft with a means to see outside the aircraft where traditional windscreens may not be feasible due to the aircraft configuration.
After revision: An external vision system (XVS) refers to any of several methods to provide the pilot of an aircraft with a means to see outside the aircraft where traditional windscreens may not be feasible due to the aircraft configuration.