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One fathom is equal to: 1.8288 metres exactly (Official international definition of the fathom) [ 10] 1.828804 m (Obsolete measurement of the fathom based on the US survey foot, only for use of historical and legacy applications) [ 11] 2 yards (1 yard is exactly 1⁄2 fathom) 6 feet (1 foot is exactly 1⁄6 fathom) 18 hands. 72 inches.
A geoid is needed to convert the 3D position to sea-level elevation. Pressure altimeter measuring atmospheric pressure, which decreases as altitude increases. Since atmospheric pressure varies with the weather, too, a recent local measure of the pressure at a known altitude is needed to calibrate the altimeter. Stereoscopy in aerial photography.
The nanometre ( SI symbol: nm) is a unit of length in the metric system equal to 10−9 metres ( 1 1 000 000 000 m = 0.000 000 001 m ). To help compare different orders of magnitude, this section lists lengths between 10 −9 and 10 −8 m (1 nm and 10 nm). 1 nm – diameter of a carbon nanotube.
A nautical mile is a unit of length used in air, marine, and space navigation, and for the definition of territorial waters. [2] [3] [4] Historically, it was defined as the meridian arc length corresponding to one minute ( 1 / 60 of a degree) of latitude at the equator, so that Earth's polar circumference is very near to 21,600 nautical miles (that is 60 minutes × 360 degrees).
The 828-metre (2,717 ft) tall Burj Khalifa in Dubai has been the tallest building since 2010. [ 1] The Burj Khalifa has been classified as megatall. [ 2] A diagram showing the tallest buildings as of 2024. This is a list of the tallest buildings. Tall buildings, such as skyscrapers, are intended here as enclosed structures with continuously ...
9 Under 1,000 metres. 10 See also. ... For a complete list of mountains over 7200 m high, ... Feet Range Location and Notes Mount Everest: 8,848:
The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of 1 299 792 458 of a second, where the second is defined by a hyperfine transition frequency of caesium.
In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet. Since an international agreement in 1959, the foot is defined as equal to exactly 0.3048 meters. Historically, the "foot" was a part of many local systems of units, including the Greek, Roman, Chinese, French, and English systems. It varied in ...