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 34
allelto the Equator. E Q is the Equator. L U are Parallels of Lat-itude. (Fig. 15.) Fig. 15. 18.—*What is Longitude? The angle at the Pole contained between themeridians of any place or po-sition on earth and a certainmeridian assumed to be thefirst or prime meridian. TheLongitude is measured on… … Fig. 16. UTTMARKS GUIDE
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