United States Naval Academy - Lucky Bag Yearbook (Annapolis, MD)

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Zbc E)epartment ot Mavloation co r R. c. r, ArAUVMLL. ' OIXT c,i ,,r;u-iic-al valiu- ..f -.nl.j.vl mailer lranK ' ,1. tlii. i ■nl.al.ly the ni.,.st inip.. riant DcpannKiil at hv A.-a.lemy. The subject, known familiarly to ii as Xaw is first taken np in the second term of Second Class year. White ' s Astronomy is studied with the idea of havin;;- us yet a general idea of the solar system, the causes of seasons, cause of tides, eclipso, phases of the moon and other iihen imena. Toward the end of the term Xavi-alion in its true sense is started, our text hook hem- -Muir, with r.owditch ' s Tahles, Nautical Alm.anacs, and Azimuth les as auxiliaries. ' I ' lie instrununts used in na igati n — compass, log and lea l, se.xlant. artificial horiz(jn. ]ielorus, of chart construction, the instruments used i ' n chart work, and the meaning of chart terms, are studied an.! used practically. h:iemeiitary methods of fixing the position of a vessel hoth at sea and near land are studied S(.i as to give us some knowledge of navigation with which to start on the practical work of first class cruise. ( )n the ciaiise. each l- ' irst Classman is re(|uired each day to take sights, and therehy fix the pisition (if the ship at noon, to determine the course and distance made gocd since noon of the da ' before, the direction and strength of the currents encountered, and the course and distance to the point of destinatii.Mi. The various methods of fixing the ship ' s [. ' osition are learned jiractically so that in l- ' irst Class ear the mathematical exi)lanations are much more tangible than they w..uld otherwise he. The three weekly recitations are on theoretical work, in- tical works are gi ' en. in general, covering the work of the wx-ek. h ' rom time to time chart wcn ' k is given, courses and distances being laid down a;id taken ot f as in practice at sea. Xearh all of the examinations are thoroughly practical. In the second term the Theory of Com|)ass Devia- tions is studied and the various methods of compensation with Iheir mathematical explanations taken up. ' J ' he course also includes the elements of surveying. At the end of llu- ye.ar e.ach h ' irst Classman constructs a complete chart of a ])orlion of the Severn River from data obtained (huing the s|)riug drill i)eri(jds by surveying [)arties of miilshipmen. 29

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