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Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ...S., long. 61 39' W., to Cape Lewin, lat. 34 31' S., long. 115 6' E.; easting to be run on the parallel of 45 S. Find also the longitudes of points of arrival at and departure from the parallel. 2. On a composite track from Cape S. Mary, lat. 16 40'S., long. 50 4' E., to Mont Video, Jat. 34 43' S., long. 56 16' W., the westing to be run on the parallel of 40 S. Required the first and last courses, total distance, and longitudes of points of arrival at and departure from the given parallel. 3. Find the first and last courses, distance, and longitudes of arrival at and departure from parallel of 50 N. when sailing on a composite track from Yokohama, lat. 35 20' N., long. 139 39' E., to Cape Flattery, lat. 48 23' N., long. 124 44' W. 4. Find the first and last courses and distance when sailing on a composite track from Valparaiso, lat. 33 2' S., long. 71 28' W., to Port Lyttelton, lat. 43 36' S., long. 172 50' E., the westing being run on the latitude of Port Lyttelton; also the position of a succession of points from long. 73 W., and every 5 to destination. CHAPTER XXII. LATITUDE BY DOUBLE ALTITUDES. Art. 100. Double Altitudes.--This is a problem for determining the latitude from--(0) Two different altitudes of the same object (Sun, Moon, Star, or Planet). (b) Simultaneous altitudes of two different objects. The data required for the computation are--(1) The polar angle. (2) The two altitudes. (3) The declination. Definition.--The polar angle is the angle at the Pole between the hour circles passing through the two positions of the object or objects. (1) For the Sun, the polar angle is the interval between the apparent times of observation; therefore, if mean times are given, the equation of time must be applied to each, or the change of...Book Details
Published
October 1, 2012
Publisher
RareBooksClub.com
Pages
92
Format
Paperback
ISBN
9781154620122