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 51
Fig. 42. the needle points to the righthand side of the true merid-ian. Fig. 42 indicates West Var-iation. Fig. 43 indicates East Var-iation. … Fig. 43. 68.—*What is Deviation of the Compass? The Deviation of the Compass is the angulardifference between the com-pass meridian (the compassNorth and South line) andthe Magnetic Meridian. Itis caused by iron in the con-struction of the ship or inher cargo, also by temporarylocal attraction.
Navigation
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-98-207.webp)
