How do you convert meters to UK nautical miles?
Divide by 1,853.184. That's the UK (Admiralty) nautical mile of 6,080 feet, slightly longer than the international nautical mile of 1,852 m.
10,000 m is about 5.396 UK nautical miles. The two nautical miles differ by about 0.06%, so short of a long ocean passage you'll get the same answer either way.
Britain switched to the international nautical mile in 1970, so you'll mostly meet the old one on Admiralty charts and in older books.
What is a meter?
The meter is the SI base unit of length and is equal to 100 centimeters or 1,000 millimeters. It was originally defined as one ten-millionth of the distance from the North Pole to the equator along the meridian through Paris. Since 1983 it has been the distance light travels in a vacuum in 1/299,792,458 of a second.
What is a UK Nautical Mile?
The UK nautical mile was based on one minute of latitude, ie 1/60th of a degree. The Earth is not a perfect sphere, so a minute of latitude varies slightly with latitude, which is why a fixed length had to be chosen.
The UK nautical mile, also called the Admiralty mile, was fixed at 6,080 feet, which is 1,853.184 meters. That is 1.184 meters longer than the international nautical mile of 1,852 meters (6,076.11549 feet), which the UK adopted in 1970.