| 摘要 |
PROBLEM TO BE SOLVED: To prevent deviation from a prescribed flight region, and to improve safety by synthesizing the image data of the prescribed flight region with a map image being shown on a display for indicating on the display. SOLUTION: By referring to the current position information of an aircraft being given by a navigation system, image data indicating a prescribed flight region existing in a display area on a display is generated based on the set region information of the prescribed flight region. Then, by an image synthetic means, the image data of the prescribed flight region is synthesized with a map image being shown on a display for indicating on the display. For example, the position of own aircraft is indicated by a marker (pointer) on the map for showing deviation form a course zone (specified course zone), thus displaying an arrow for indicating a return route on the display, and hence allowing a pilot to fly along the return route for returning to the specified course zone). Also, in the case of the deviation, voice announcement reports the deviation to the pilot.
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