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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, Spanje)

Ontdek het Spaanse maritieme erfgoed in het Naval Museum van Madrid! Bewonder indrukwekkende collecties, prachtige glas-in-loodplafonds en architecturale pracht die de maritieme geschiedenis tonen van de Renaissance tot nu.

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