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Aboard ship a dead reckoning plot is considered important in evaluating position information and planning the movement of the vessel. [8] Dead reckoning begins with a known position, or fix, which is then advanced, mathematically or directly on the chart, by means of recorded heading, speed, and time. Speed can be determined by many methods.
Inertial navigation system (INS) is a dead reckoning type of navigation system that computes its position based on motion sensors. Before actually navigating, the initial latitude and longitude and the INS's physical orientation relative to the Earth (e.g., north and level) are established.
A team investigates mysteries involving the work of Nikola Tesla.Shortly before his death in 1943, Tesla claimed to have had 80 trunks containing details of his work, but much fewer were ever found: in the first episode, the team investigates whether there was a cover-up to suppress his work.
Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time is a 1995 best-selling book by Dava Sobel about John Harrison, an 18th-century clockmaker who created the first clock (chronometer) sufficiently accurate to be used to determine longitude at sea—an important development in navigation.
The series was ordered by the History Channel with an eight-episode initial order. [1] The first two episodes were directed by Lesli Linka Glatter. [2] Six premiered on January 18, 2017. [3] Six was renewed for a second season of 10 episodes and aired in 2018. [4] [5] In June, History announced the series' cancellation. [6]
With the exception of medical check-ins, the participants are isolated from each other and all other humans. They may "tap out" at any time, or be removed due to failing a medical check-in. The contestant (or team in Season 4) who remains the longest wins a grand prize of $500,000. As of July 27, 2020, 112 episodes of Alone have aired.
Decoding the Past (2005–2008) is a History Channel paranormal television series that "decodes" the past by looking for unusual, and mysterious things written throughout history that may give clues as to what will happen in the future.
John Harrison (3 April [O.S. 24 March] 1693 – 24 March 1776) was an English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of how to calculate longitude while at sea.