The Work of the Coast And Geodetic Survey
The Work of the Coast And Geodetic Survey
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In our eReader you can find the full English version of the book. Read The Work of the Coast And Geodetic Survey Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Work of the Coast And Geodetic Survey
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" Having decided where a line is to begin, the boat is moved to that point. Two observers, with sextant in hand, the recorder, witli a watch or clock and record book, and the leadsman, with his "lead line, " take their respective positions. The officer in charge directs the recorder to make a note, say, as follows: "Line begins at angle / 1, about 20 meters from shore, south of Fleck's Point; course about east. " The observers measure the angles between three signals on shore and read the angle...s measured; the leadsman gets a cast of the lead and calls out the number of feet or fathoms, and the recorder records all these, with the time when the boat begins to move. The boat starts ahead and does not stop again until the end of the line is reached. Other j^airs of angles are taken by the observers at three or four minute intervals, or as frequently as necessary, each set of angles locating the position of the boat at the instant of observation. At the end of the line a final set is taken.
What to read after The Work of the Coast And Geodetic Survey?
You can find similar books in the "Read Also" column, or choose other free books by U.S. Coast And Geodetic Survey to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
" Having decided where a line is to begin, the boat is moved to that point. Two observers, with sextant in hand, the recorder, witli a watch or clock and record book, and the leadsman, with his "lead line, " take their respective positions. The officer in charge directs the recorder to make a note, say, as follows: "Line begins at angle / 1, about 20 meters from shore, south of Fleck's Point; course about east. " The observers measure the angles between three signals on shore and read the angle...s measured; the leadsman gets a cast of the lead and calls out the number of feet or fathoms, and the recorder records all these, with the time when the boat begins to move. The boat starts ahead and does not stop again until the end of the line is reached. Other j^airs of angles are taken by the observers at three or four minute intervals, or as frequently as necessary, each set of angles locating the position of the boat at the instant of observation. At the end of the line a final set is taken.
What to read after The Work of the Coast And Geodetic Survey?
You can find similar books in the "Read Also" column, or choose other free books by U.S. Coast And Geodetic Survey to read onlineMoreLess
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