| 摘要 |
An aircraft (160) approaches a landing point (162) following a flight path (164) to a designation point (166), the pilot sights the landing point (162) and activates the apparatus. A first calculation of coordinates for the landing point (162) is made and landing symbology generated. The pilot reviews the landing symbology and decides whether or not there is an acceptable correlation with (10) the landing point (162). If not, the pilot will continue along the flight path (164) activating the apparatus at further designation points (168, 170 and 172) to reduce the designation error between the coordinates calculated by the apparatus and the real world landing position (162) observed by the pilot until the pilot is satisfied. At this point the pilot enters a landing phase and the (15) symbology provides the pilot with landing cues even when the helicopter (160) enters a brown out event indicated by cloud (174).
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