灯光的焦平面位于平均海平面以上200尺，如天气清朗，远至23海里的水域也能看见。
The focal plane of the light is 200 feet above mean sea level, and in clear weather it should be seen at a distance of 23 nautical miles.
灯光的焦平面位于平均海平面以上200尺，如天气清朗，远至23海里的水域也能看见。
The focal plane of the light is 200 feet above mean sea level, and in clear weather it should be seen at a distance of 23 nautical miles.
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