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Three-armed compass

This measuring instrument has a circle calibrated from 0º to 180º and from 180º to 0º, featuring 2 moving rulers with pressure screws, verniers, and a file. The rulers can be used to form two horizontal angles using 3 points on the ground which, when transferred to the plotter, can determine the position. The instrument is used to create nautical charts, or to allow a navigator or hydrographer to establish their position on a map using the measurement (provided by the graphometer or sextant) of the two angles formed by 3 known points on the land.It was made by the English scientific instrument makers Heath & Co.

henrietta elizabeth dodd hoopes heath (1904 – 1996)

Discover Henrietta Hoopes Heath (1904-1996), an American artist featured in 'Who's Who Among American Artists'. Known for her navigational instrument paintings like "Three-Armed Compass" and competition alongside Andrew Wyeth, Heath’s work blends art

Naval Museum (Madrid, Spanien)

Udforsk Spaniens flådearv på Naval Museum i Madrid! Oplev imponerende samlinger, smukke glasmosaikker og arkitektonisk storhed, der viser maritim historie fra renæssancen til moderne tid.

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