Answer: Vatican City, Monaco, Nauru, Tuvalu, San Marino, Liechtenstein, Marshall Islands, St. Kitts and Nevis, Seychelles, Maldives.
Next question: As a pilot I have to deal with units of distance in three different systems. I measure altitude in feet, visibility in meters and distance in nautical miles. Nautical miles are about 15% bigger than ordinary miles, and I even use the knot - 1 nautical mile per hour - as my unit of speed. Why are nautical miles so useful? Why are they used in preference to miles or kilometers?
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