Uttmark's guide to the United States local inspectors examination for masters and mates of ocean going steam and sailing ships (1919)
Uttmark, Fritz E · [New York] The Author · leaf 31
Fig. 6. UTTMARKS GUIDE 8.—*What is the supplement to an Arc or Angle? The difference between anarc or caigle and 180° iscalled its supplement. The arc C B (Fig. 7) itJ, the supplement to C D. The angle C A B is the Fiff 7 o* supplement to C A D. … 9.—*What is a Great Circle? A circle whose plane passesthrough the center of asphere is called a great circle.All the lines in Fig. 8 arcgreat circles.
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-168-96.webp)
