Method and system for providing an aircraft drift advisory

An aircraft drift advisory method comprising:

• measuring aircraft parameters including altitude, drift velocity and drift direction;
• calculating a difference between an aircraft drift distance in a spatial dimension and a corresponding threshold distance;
• calculating the time interval since the aircraft drift distance was last less than the corresponding threshold distance;
• comparing said time interval to a criterion time;
• and
• issuing a drift advisory when said time interval equals or exceeds said criterion time.

An aircraft drift advisory system comprising:

• an apparatus adapted to measure a perspective angle representational of a direction of a pilot's line of sight in reference to an aircraft longitudinal axis;
• a navigation system adapted to measure aircraft parameters including altitude, drift velocity and drift direction;
• a data processor coupled to the apparatus and the navigation system, the data processor being adapted to
• define a foveal cone comprising a cone swept out by a foveal angle rotated about the line of sight;
• calculate a risk measure whenever the drift direction is not contained within the foveal cone;
• issue a drift advisory when the risk measure equals an advisory criterion.

An aircraft drift advisory method comprising:

• measuring a perspective angle representational of a direction of a pilot's line of sight in reference to an aircraft longitudinal axis;
• measuring aircraft altitude, drift velocity and drift direction;
• defining a foveal cone comprising a cone swept out by a foveal angle rotated about the line of sight;
• calculating a risk measure whenever the drift direction is not contained within the foveal cone;
• issuing a drift advisory when the risk measure equals an advisory criterion.