发动机效率很高，丹麦首席工程师指出，船每平均行驶17节，每海里每吨货物只消耗3克燃料-这听起来肯定算很低了。
Yet so efficient is the engine, says the Danish chief engineer, that cruising at an average of 17 knots the ship consumes just 3 grams of fuel per tonne per nautical mile-which certainly sounds low.
筏子航行时平均时速4海里。
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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