What knots do sailors use to measure speed? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

What knots do sailors use to measure speed? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

What knots do sailors use to measure speed?

A knot is an off-system unit of ship speed used in the maritime practice of many states (including Russia), equal to one nautical mile per hour (1,852 kilometers per hour, or 0,514 meters per second).

The term "knot" originated in the era of the sailing fleet, when the speed of the vessel was measured by a hand log, the log of which was divided into segments of 1/120 nautical mile (about 15,4 meters), indicated by tied knots. The lag sector was thrown over the side of the moving ship and, holding in place by the resistance of the water, pulled the laglin behind it from the ship. The number of laglin knots drawn from the lag view in 1/120 hour (0,5 minute) corresponds to the ship's speed in knots, that is, in miles per hour.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

What grade did the teacher give at school for the design of the current US flag?

The US flag changes every time new states are admitted to the state - new stars are added. The last time the flag was changed was in the late 1950s, when Hawaii and Alaska were granted statehood. More than 1500 options for the location of the stars came to the name of the president, and in the end, the option of 18-year-old Robert Heft was adopted. Although the teacher at the school, to whom he first handed over the project, put 4 with a minus for the work, and jokingly promised to revise the grade if the US Congress approved his project. And so it happened - and the teacher had to change the grade to 5.

Test your knowledge! Did you know...

▪ Why did the Portuguese prince Henry the Navigator get his nickname?

▪ Where did dogs come from?

▪ Which village is the birthplace of two marshals and twelve generals?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

A New Way to Control and Manipulate Optical Signals 05.05.2024

The modern world of science and technology is developing rapidly, and every day new methods and technologies appear that open up new prospects for us in various fields. One such innovation is the development by German scientists of a new way to control optical signals, which could lead to significant progress in the field of photonics. Recent research has allowed German scientists to create a tunable waveplate inside a fused silica waveguide. This method, based on the use of a liquid crystal layer, allows one to effectively change the polarization of light passing through a waveguide. This technological breakthrough opens up new prospects for the development of compact and efficient photonic devices capable of processing large volumes of data. The electro-optical control of polarization provided by the new method could provide the basis for a new class of integrated photonic devices. This opens up great opportunities for ... >>

Primium Seneca keyboard 05.05.2024

Keyboards are an integral part of our daily computer work. However, one of the main problems that users face is noise, especially in the case of premium models. But with the new Seneca keyboard from Norbauer & Co, that may change. Seneca is not just a keyboard, it is the result of five years of development work to create the ideal device. Every aspect of this keyboard, from acoustic properties to mechanical characteristics, has been carefully considered and balanced. One of the key features of Seneca is its silent stabilizers, which solve the noise problem common to many keyboards. In addition, the keyboard supports various key widths, making it convenient for any user. Although Seneca is not yet available for purchase, it is scheduled for release in late summer. Norbauer & Co's Seneca represents new standards in keyboard design. Her ... >>

The world's tallest astronomical observatory opened 04.05.2024

Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>

Random news from the Archive

Record Density DDR5 Chips 24Gbps 19.12.2021

South Korean memory chip manufacturer SK Hynix announced the successful development of DDR5 DRAM chips with an industry-leading 24Gb chip density.

SK Hynix released the first DDR5 DRAM chip with a density of 16 Gb in October 2020. And now the South Korean manufacturer is increasing the density to 24 Gb (the DDR5 standard provides for a peak density of 64 Gb).

The new memory is based on improved 1anm technology using hard ultraviolet (EUV) lithography. Manufacturer claims up to 33% higher yield and speed with 25% lower energy consumption than current products

The new chips will form the basis of future 5 and 48 GB DDR96 modules, which will first find use in data centers, and then probably get to consumer PCs.

SK Hynix has already shipped the first samples of the new memory to customers, and large-scale shipments will begin next year. In a press release, among the partners, Intel is indicated, which is preparing to release 4th generation Xeon Scalable server processors (Sapphire Rapids) with DDR5 and PCIe 5.0 - they will be based on the current Golden Cove architecture (Core 12th generation).

Other interesting news:

▪ Artificial sperm created

▪ New ATtiny 24/44/84 processors

▪ 4D drone camera

▪ Bioreactor for soldiers

▪ Space rocket powered by coal

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Electricity for beginners. Article selection

▪ article Forensic Medicine and Psychiatry. Crib

▪ Article Which countries of the world are in the top ten largest in terms of population? Detailed answer

▪ article Workbench lamp. home workshop

▪ article Manual for the repair of speakers 75GDN. Encyclopedia of radio electronics and electrical engineering

▪ article Turning a snake into a stick. Focus Secret

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews