| 摘要 |
The present invention provides a method and apparatus configured to provide graphical symbols indicative of a separation value between a first and second location, measured from a predetermined reference point. In one embodiment, the separation value relates to at least one of the direct distance between said first and second locations and the angle subtended between said first and second location at the said predetermined reference point. In one embodiment, the separation value may be resolved into mutually orthogonal components. An alpha-numeric display may also be included and configured to represent the magnitude of said separation values.
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