免费航海方位转换器
在航海方位和角度之间转换，适用于海上导航。
Quadrant
3
公式
## Nautical Bearings ### Three-Figure Bearing Bearings are always given as three digits measured clockwise from north: 000° to 360°. ### Quadrants | Quadrant | Range | Cardinal | |---|---|---| | Q1 | 000°-090° | N to E | | Q2 | 090°-180° | E to S | | Q3 | 180°-270° | S to W | | Q4 | 270°-360° | W to N | ### Reciprocal Bearing The opposite direction: add 180° (or subtract if over 180°). Used to find the return course.
计算示例
Analyze bearing 225°.
- 01Quadrant 3 (180°-270°): Southwest
- 02Reciprocal = 225 - 180 = 045° (Northeast)
- 03Approximate magnetic (-14° West US) = 239°
常见问题
What is a reciprocal bearing?
The bearing in the exact opposite direction. If you are heading 225° (SW), the reciprocal is 045° (NE). Used to navigate back the way you came.
What is magnetic declination?
The difference between true north and magnetic north at your location. In the western US it is about 10-15° east (add to true bearing for magnetic). In the eastern US it is 10-20° west (subtract).
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