Navigation assisting apparatus, aircraft in which the...

Details Navigation assisting apparatus, aircraft in which the... Navigation assisting apparatus, aircraft in which the...

2005-11-29

2005-11-29

Black, Thomas G. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Determination of e.t.a.

C701S120000, C340S994000

Reexamination Certificate

active

06970784

ABSTRACT:
An arithmetic unit calculates an estimated time of arrival (ETA) of an aircraft at a target point, and obtains a difference between ETA and a required time of arrival (RTA) at the target point. It multiplies a time error corresponding to the difference in time by the velocity of the aircraft, thereby converting the time error to a distance error. The distance error is symbol-displayed as ΔPTIMEin a display unit. Thus, the time error concerning a flight of the aircraft is visually displayed as a distance error. If the distance error exceeds a preset threshold value, a caution such as a display message or a voice message is generated.

REFERENCES:
patent: 2646924 (1953-07-01), Schuck
patent: 4774670 (1988-09-01), Palmieri
patent: 5121325 (1992-06-01), DeJonge
patent: 5365449 (1994-11-01), Kashiwazaki
patent: 5408413 (1995-04-01), Gonser et al.
patent: 5724243 (1998-03-01), Westerlage et al.

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