What is the concept of the speed of a ship

1 nautical mile hour.

One knot, one nautical mile hour, kilometer hour.

Section]: A unit of speed for a ship to sail, and later, also for the speed of wind and ocean currents.

The code name of "knot" is the English "knot", which refers to the length of 1 minute of latitude on the meridian of the earth, because the earth is slightly ellipsoidal, the 1 minute radian at different latitudes is slightly different. At the equator, 1 nautical mile is equal to about 1,843 meters; At latitude 45° it is approximately equal to meters, and the poles are approximately equal to meters. The 1929 International Conference on Hydrography adopted the use of 1 point with an average length of 1852 meters as 1 nautical mile; In 1948, the International Conference on the Safety of Life recognized that 1,852 meters or feet was 1 nautical mile, so 1,852 meters was used as the standard nautical mile length internationally.

China recognizes this criterion, which is indicated by the code "M".

It is said that the festival has an interesting origin. As early as the 16th century, sea navigation was quite developed, but there was no voyage recorder, and it was difficult to calculate the speed of the ship. A clever sailor came up with a clever idea:

A float with a rope is thrown into the sea while the boat is sailing, and the speed of the ship is measured according to the length of the rope pulled out over a certain period of time. In order to calculate the speed of the ship more accurately, many knots were tied at equal distances on the long rope, and the whole speed rope was divided into several "knots". As long as the number of "knots" of the rope being pulled per unit time is measured, the corresponding speed can be calculated.

Therefore, "knot" has become the name of the unit of measurement of the speed of international navigation, and its unit symbol is knot is 1 nautical mile hour, and "nautical mile" is the length unit of sea distance. It originally referred to the length of 1 minute of latitude on the meridian of the earth, also known as the "meridian". Due to the slightly ellipsoidal shape of the Earth, its length of 1 minute varies slightly at different latitudes.

In 1929, the International Hydrographic Society stipulated that the average length of 1852 meters at 1 point of latitude was 1 nautical mile; This provision was recognized by the International Conference on the Safety of Life at Sea in 1948. Therefore, the international standard nautical mile length of 1852 meters, that is, kilometers.

knots are the concept of speed, which is not the same as nautical mile kilometers (distance units);

One knot km per hour.

There are many nautical mile standards, and if you are interested, you can convert it yourself.

1 nautical mile = kilometer (km) (Chinese standard).

1 nautical mile = kilometer (km). (U.S. Standards).

1 nautical mile = kilometer (km). (British Standard).

1 nautical mile = kilometer (km). (French Standard).

1 nautical mile = kilometer (km). (Russian standard).

1 knot = 1 nautical mile hour. The speed is as many knots as there are nautical miles in hours. The nautical mile should be uniform, one minute the length of the earth.

** The speed is almost always 30 knots! Do you think it's slow? You'll understand after reading it!

knots (kn) used to be used by the crew to measure the speed of the ship, and for every 1 nautical mile walked, the crew made a knot on the lowered rope. In the future, knots will be used as a unit of ship speed.

1 knots (kn) = 1 nautical mile hour = (1852 3600) m s is the unit of velocity.

1 nautical mile (n mile) = 1852m is the unit of length.

The speed measurement unit of land vehicles and airplanes in the air, as well as river vessels, is mostly measured in kilometers (kilometers) hours, while the speed unit of sea vessels (including **) is called "knots".

As early as the 16th century, sea navigation was quite developed, but there were no clocks and no voyage recorders, so it was difficult to determine the speed of a ship with certainty. However, a clever sailor came up with a clever trick to throw a towing rope float into the sea while the ship was sailing, and then calculate the speed of the ship according to the length of the rope pulled out in a certain amount of time. At that time, quicksand timers were still used.

In order to calculate the speed of the ship more accurately, sometimes the rope released is very long, so many knots are tied at the equal distance of the rope, so that the whole speed rope is divided into several sections, as long as the number of sections of the rope is pulled in the same unit time, the corresponding speed is naturally measured. As a result, the "knot" became the unit of measurement for the speed of the sea vessel; Correspondingly, the speed measurement units of sea water velocity, sea wind speed, torpedoes and other underwater weapons are also commonly used in the world

The code name of "knot" is the prefix of "knot", which is represented by "kn". 1 knot is equal to 1 nautical mile per hour, which is kilometers (kilometers) traveled per hourThe unit of measurement of short distances at sea is "chain", 1 chain is equal to 1 10 nautical miles, and the code is the prefix of "cable" in English, with "cab".

A nautical mile is a unit of length in the sea. It originally referred to the length of 1 minute of latitude on the meridian of the earth, and because the earth is slightly ellipsoidal, the radian of 1 minute at different latitudes is slightly different. At the equator, 1 nautical mile is equal to about 1,843 meters; At latitude 45° it is approximately equal to meters, and the poles are approximately equal to meters.

In 1929, the International Hydrographic Society Liang Dahui approved the use of 1 point with an average length of 1852 meters as 1 nautical mile; In 1948, the International Conference on the Safety of Life recognized that 1,852 meters or feet was 1 nautical mile, so 1,852 meters was used as the standard nautical mile length internationally. China recognizes this criterion, which is indicated by the code "M".

In addition, the length unit of the mark for the segmented manufacture and use of anchor chains on ships also uses "knots", which usually stipulates that the length of the anchor chain is 1 knot; The sign of use of Chinese ships is 2o meters for 1 section.

The speedometer of modern sea vessels has been very advanced, and some can be digitally displayed at any time, and the "rope throwing knot" has long become history, but the "knot" is still used as a speed unit of sea vessels.

knots (kn) used to be measured by the crew, and every 1 nautical mile walked, the old skier made a knot on the lowered rope. In the future, the section will be used to make the unit draft of the ship's speed.

1 knot(kn) = 1 nautical mile key macro = (1852 3600) m s is the unit of velocity.

1 nautical mile (n mile) = 1852m is the unit of length, and they are all used for navigation only.

Generally, the maximum speed of large warships is about 30-33 knots, the maximum speed of conventional submarines is about 20 knots, and nuclear submarines are generally between 20-30 knots, and 1 knot is equal to 1 nautical mile is equal to a kilometer. The unit of measurement of short distances at sea is the chain, and 1 chain is equal to 1 10 nautical miles, which is about equal to the meter.

The average battleship is at 18-30 knots, and the aircraft carrier is around 30-33 knots.

1 knot 1 nautical mile hour, 1 nautical mile 1852 meters.

The key to solving such a problem is to have ideas, and you can't only give the answer to the people above, and you will still encounter problems in the future. Here's how it works:

1 km (km) = nautical mile.

1 nautical mile = kilometer.

1 knot = 1 nautical mile hour = kilometer hour.

Popularize the relevant knowledge: the maximum speed of China's ocean-going transport ships can reach 25 26 knots, ** category: aircraft carrier speed 35 40 knots, cruiser speed 30 38, destroyer speed 30 38 knots, frigate speed 30 35 knots, battleship speed 30 35.

In addition, some speedboats can reach speeds of more than 45 knots.

In addition, at present, the unit "kilometer" has been abolished, to say "kilometer". The question you ask is equivalent to kilometers per hour.

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1 knot = 1 nautical mile hour = kilometers per hour.

Hello, one knot is equal to one nautical mile, one nautical mile is equal to 1854 meters, one kilometer is equal to 1000 meters, and one nautical mile is equal to one kilometer.

A knot is a unit of velocity.

Now the international common use is 1 knot, 1 nautical mile hour, 1 nautical mile kilometer. 1 knot, which is kilometers per hour.

One knot is one nautical mile per hour, and the nautical mile is 1,852 meters.

That is, one section is 1,852 meters per hour at sea.

i.e. 24 knots = 24 knots 43 km h.

One knot is equal to 1 nautical mile per hour, which is kilometers per hour.

The unit of measurement of short distances at sea is a chain, and 1 chain is equal to one-tenth of a nautical mile.

At present, the maximum speed of ordinary military ships is about 35 to 40 knots. There are no more than 40 knots, and the United States has now leased several fast transport ships that can reach a speed of 45 knots for experiments, but the actual destruction is also in good use, and the general speed is also controlled at 35 to 40 knots.

The fastest underwater speed of the submarine is Russia's K1 titanium alloy attack nuclear submarine, 20 of which have been built, and only 1 is still in active service, with an underwater speed of 40 knots, as fast as a torpedo.

A speed of 40 knots is equivalent to a speed of about 72 kilometers per hour. The speed is fast, the hull is easy to be damaged under the impact of ocean waves, and the carrier using hydrofoil lifting technology or ground effect technology, although the high-speed performance is good, but when the medium and low speed is shielded, its maneuvering lead performance can not reach a satisfactory degree. At the same time, there are also many risks such as load, economy and stability.

As early as the 16th century, with the development of the economy of various countries, frequent commercial exchanges, which promoted the development of navigation, there were requirements for the carrying capacity and transportation speed of ships, but due to the relatively backward science and technology at that time, there were no instruments and equipment to measure the speed of ships. A clever sailor came up with a way to make a float on a very long speed measuring rope, at equal distances, to fix a fan-shaped plank with lead on the lower edge of the rope that had been played several knots as a float, and to throw a towed rope float to the sea when the ship was sailing, and to time it with a quicksand timer called quicksand, and to calculate how many knots there were in the length of the rope to be released in the same unit of time. The speed of the ship can be calculated more intuitively, and the "knot" becomes the unit of measurement of the ship's speed.

I was wrong just now, and I saw it as a 1-minute radian length of the weft, and if I looked closely, it was a 1-minute radian length of longitude, and it seems that there is a problem with my eyes now.

In the past, the crew used to measure the speed of the ship, and every 1 nautical mile walked, the crew would make a knot on the rope that lowered the disturbance. Later, knots were used as a unit of ship speed.

1 knots = 1 nautical mile hour = (1852 3600) m s

Description: 1 nautical mile = 1852m, nautical mile is a unit of length.