 ... ascertained at sea by observing the magnetic bearing of- the sun when in the horizon, or at a given altitude abo-ve it. From this observation the true bearing is found by rules given in nautical astronomy. The difference between the true bearing and...  Navigation and Nautical Astronomy - Page 13by H. W. Jeans - 1858Full view - About this book
 | H. W. Jeans - 1853 - 314 pages
...these will be more clearly seen in the use of the instruments themselves. THE COMPASS AND LOG-LINE. to the course steered by compass, to reduce it to...right of the north point of the heavens ; then the NXW point of the compass card will evidently point to the true north, and every other point on the... | |
 | Henry William Jeans - 1868 - 228 pages
...astronomy. The difference between the true bearing and the observed bearing is the variation of the compass. The method of correcting the course for variation will be more readily understood by means of a few examples. Suppose the variation of the compass is found to be two points to the east, that is,... | |
 | Thomas Liddell Ainsley - 1869 - 450 pages
...charts used in navigation. The method of correcting Compass Courses or Bearings for Variation will be readily understood by means of an example. Suppose the variation of the compass ia found to be two points cast, that la, tho needle is directed two points to the right of the north... | |
 | Henry William Jeans - 1870 - 288 pages
...astronomy. The difference between the true bearing and the observed bearing is the variation of the compass. The method of correcting the course for variation will be more readily understood by means of a few examples. Suppose the variation of the compass is found to be two points to the east, that is,... | |
 | Thomas Liddell Ainsley - 1875 - 416 pages
...used in navigation. i The method of correcting Compass Courses or Bearings for Variation will Ъе readily understood by means of an example. Suppose the variation of the compass is found to be two points east— That is, the needle is directed two points to the right of the north point of the... | |
 | Thomas Liddell Ainsley - 1880 - 482 pages
...charts used in navigation. The method of correcting Compass Courses or Bearings for Variation will be readily understood by means of an example. Suppose the variation of the compass is found to be two points East — that is, the needle is directed two points to the right of the North point of the... | |
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