| 摘要 |
The marker has a pair of upwardly converging reflectant planar panels facing approximately in opposite directions. In its correct attitude on a support surface the panels slope at 2 DEG -6 DEG to the vertical if the marker is intended for assisting the landing of fixed wing aircraft and at 8 DEG -10 DEG to the vertical if the marker is intended for assisting the landing of helicopters. The reflectant panels are preferably retroreflectant.
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