Having heard that the vessel went with a speed of 10 knots, the people not familiar with seafaring are forced to specify, it is a lot of or a little, well or badly. Sea terminology is in most cases quite difficult for profane persons, but with transfer of knots to habitual kilometers per hour and vice versa there is nothing difficult.
Instruction
1. Knot - the unit of measure of speed of the ship or plane equal to one nautical mile an hour. This term comes from the primitive device for measurement of vessel speed under the name "sector log". It represented a triangular board with the thin cord tied to it with knots, and resembled on a kite. The board was thrown out for a stern of the ship and considered the number of the knots leaving overboard for some time (as a rule, 15 seconds or minute). Distance between small knots and time of measurement were selected so that speed in nautical miles an hour as a result turned out.
2. The nautical mile is equal to 1852 meters. This distance corresponds to one angular minute of geographic latitude, that is the one sixtieth part of degree. Respectively, 60 nautical miles along a meridian will make one degree of latitude, and the ship going along this meridian with a speed of one knot will pass for an hour 1 angular minute. For navigation it turned out very convenient to use such method of measurement of distances therefore the knot and nautical mile are still widely used at the sea and in aircraft.
3. To transfer kilometers per hour to knots, it is necessary to increase speed in kilometers by 0.54. The received result will be speed in nodes or in nautical miles an hour. For the return recalculation the speed in knots needs to be increased by 1.852, kilometers per hour as a result will turn out. In spite of the fact that the nautical mile is not included into the International System of Units, its use, so and use of knots, it is quite allowed.
4. Not to remember quite difficult ratios of knots, nautical miles and traditional kilometers, for the translation it is possible to use one of numerous online converters (calculators of the translation of units of measure) which will help to transfer some values to others quickly.