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Statements

Subject Item
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Rule of marteloio Regra do marteloio Tauleta de marteloio
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The rule of marteloio is a medieval technique of navigational computation that uses compass direction, distance and a simple trigonometric table known as the toleta de marteloio. The rule told mariners how to plot the traverse between two different navigation courses by means of resolving triangles with the help of the Toleta and basic arithmetic. La tauleta de marteloio, o regla de marteloio, és una taula (ordenada en files i columnes) de xifres relacionades amb la navegació medieval. En el context de la navegació medieval (basada en la brúixola, la carta portolana, l'ampolleta nàutica i les sestes) era habitual situar la posició estimada del vaixell sobre la carta amb mitjans geomètrics, de forma gràfica. La tauleta de marteloio seria un instrument aritmètic per a “calcular” la posició del vaixell aplicant les matemàtiques. A regra do marteloio é uma técnica medieval de computação navegacional que usa a direção da bússola, a distância e uma tabela trigonométrica simples conhecida como toleta de marteloio. A regra dizia aos marinheiros como traçar a travessia entre dois cursos de navegação diferentes por meio da resolução de triângulos com a ajuda da toleta e da aritmética básica.Os incômodos com a manipulação de números poderiam recorrer ao visual tondo e quadro (círculo e quadrado) e obter a resposta com paquímetros. A regra do marteloio era comumente usada pelos navegadores do Mediterrâneo durante os séculos XIV e XV, antes do desenvolvimento da navegação astronômica.
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The rule of marteloio is a medieval technique of navigational computation that uses compass direction, distance and a simple trigonometric table known as the toleta de marteloio. The rule told mariners how to plot the traverse between two different navigation courses by means of resolving triangles with the help of the Toleta and basic arithmetic. Those uncomfortable with manipulating numbers could resort to the visual tondo e quadro (circle-and-square) and achieve their answer with dividers. The rule of marteloio was commonly used by Mediterranean navigators during the 14th and 15th centuries, before the development of astronomical navigation. A regra do marteloio é uma técnica medieval de computação navegacional que usa a direção da bússola, a distância e uma tabela trigonométrica simples conhecida como toleta de marteloio. A regra dizia aos marinheiros como traçar a travessia entre dois cursos de navegação diferentes por meio da resolução de triângulos com a ajuda da toleta e da aritmética básica.Os incômodos com a manipulação de números poderiam recorrer ao visual tondo e quadro (círculo e quadrado) e obter a resposta com paquímetros. A regra do marteloio era comumente usada pelos navegadores do Mediterrâneo durante os séculos XIV e XV, antes do desenvolvimento da navegação astronômica. La tauleta de marteloio, o regla de marteloio, és una taula (ordenada en files i columnes) de xifres relacionades amb la navegació medieval. En el context de la navegació medieval (basada en la brúixola, la carta portolana, l'ampolleta nàutica i les sestes) era habitual situar la posició estimada del vaixell sobre la carta amb mitjans geomètrics, de forma gràfica. La tauleta de marteloio seria un instrument aritmètic per a “calcular” la posició del vaixell aplicant les matemàtiques.
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