determination of the geographical area, a warning system, close to the ground.

摘要

the present invention relates to systems for alerting the pilot of a plane or a submarine of the proximity of obstacles or a field and, in particular, a system that uses dataposition calculated by a method of navigation as well as the data of altitude and barometric altitude and radio data and rates of change.gradient signals and other flight parameters, and gives an opinion or a warning to the pilot in the event of accident conditions.