A Guide book to the Local Marine Board Examination the Ordinary Examination
A Guide book to the Local Marine Board Examination the Ordinary Examination
Thomas Liddell Ainsley
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1560 log. 2-i93i5 Middle Latitude Sailing. '99 Ex. 4. Lat. From 59° o' N. , long, from 3" 33' E. , the ship sailed between S. And E. , making difF. Lat. 81-7 and dep. 17 2*7. B. Lat. 6, 0)8, 1-7 I 21-7 or i"»22'S. I^at. From 59 N. Lat. In 57 38 N. 116 38 Mid. Lat. 58 19 By Inspection. 58° Dep. 159-0 give D. Long. 300 13-8 „ 26 172-8 „ 326 By Calculation Mid. Lat. 58° 19' sec. 0-279655 Dep. 172-7 log. 2*237292 log. 2-516947 D. Long. 328-8 6, 0)32, 8-8 5°28'-8 59'. Dep. 154*5 give D. Long. 300 i»...o „ 35 i72"5 335 D. Long, for mid. Lat. 58° is 326 »> »> 59 >» 335 DifiF. For i°ofmid. Lat. 9 60' (or i") 19 9 6, 0)17, 1 2-85 D. Long, for mid. Lat. 58° is 326 Corr. For 19' (over 58°) + 2-8 D. Long, for mid. Lat. 58" 19' is 328-8 Remark. — When the mid. Lat. Is high and between two whole degrees, and also the dep. Great as in this example, the diff. Long, is best found by calculation. Ex. 5. Sailed from A, in lat. 50' 48' M. , long. 1° 10' W. , S. 41° E. , 275 miles. Entering Traverse Table II with dist.
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