单词 | seven-eighths rule |
释义 | seven-eighths rule [¦sev·ǝn `āths ´rül] NAVIGATION A thumb rule which states that the approximate distance to an object broad on the beam equals seven-eighths of the distance traveled by a craft while the relative bearing (right or left) changes from 30 to 60° or from 120 to 150°, neglecting current and wind. |
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