1. A method for automatically planning a route to a predefined termination point of an unmanned vehicle when failure occurs in the vehicle resulting in that the unmanned vehicle not can complete its predetermined route in an area of interest, the method comprising: receiving an indication that failure has occurred; positioning the vehicle; determining control parameters, and controlling the vehicle to move in accordance to the determined control parameters; wherein said control parameters include an altitude read from a topographical map indicating lowest allowable flight altitude to achieve glide path to the termination point, and a direction read from a map of vectors pointing in the direction towards based on the position.