| 释义 |
seven-tenths rule seven-tenths rule[¦sev·ən ′tenths ‚rül] (navigation) A thumb rule which states that the approximate distance to an object broad on the beam equals seven-tenths of the distance traveled by a craft while the relative bearing (right or left) changes from 22.5° to 45° or from 135° to 157.5°, neglecting current and wind. |