Decimal Degrees and Gradians

Home Forums Nautical Research: 1500 – 1830 Decimal Degrees and Gradians

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    Is it correct to say that in the early 19th century, decimal degrees (as opposed to degrees-minutes-seconds) were used ONLY to express latitude-longitude coordinates — not navigational bearings? Does anyone know when decimal degrees began to be used to express navigational bearings?

    Also, is it correct to say that in the early 19th century, gradians (aka gons, radians) were used ONLY for measuring angles in surveying and mathematics, and elevation in astronomy — not for navigational bearings? Does anyone know of gradians EVER being used to express navigational bearings?

    Thanks!

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