 In all such cases angles should be taken to several objects, the more the better; but five objects is a good number, as the four angles thus obtained not only prevent any errors, but they at once furnish a means of checking the accuracy of the chart itself.  Special Publications - Seite 171900Vollansicht - Über dieses Buch
 | 1900 - 580 Seiten
...may put the ship ashore. It ia not intended that the use of the compass to fix the ship should 1)6 given up ; there are many circumstances in which it...taken to several objects", the more the better; but Hve objects is a good number, as the four angles thus obtained not only prevent any errors, but they... | |
 | U.S. Coast and Geodetic Survey - 1912 - 178 Seiten
...the fixing of a rock or shoal, or of additions to a chart, as fresh soundings or new buildings. In such cases angles should be taken to several objects,...is a good number, as the four angles thus obtained prevent any errors. When only two objects are visible, a sextant angle can be used to advantage with... | |
 | United States. Hydrographic Office - 1915 - 1286 Seiten
...fresh soundings or new buildings as additions to the chart, the sextant should invariably be used. In all such cases angles should be taken to several...means of checking the accuracy of the chart itself. If a round of angles can be taken the observer's accuracy is also checked. In the case of ordinary... | |
 | United States. Hydrographic Office - 1915 - 658 Seiten
...fresh soundings or new buildings as additions to the chart, the sextant should invariably be used. In all such cases angles should be taken to several...means of checking the accuracy of the chart itself. If a round of angles can be taken the observer's accuracy is also checked. In the case of ordinary... | |
 | United States. Hydrographic Office - 1915 - 590 Seiten
...fresh soundings or new buildings as additions to the chart, the sextant should invariably bo used. In all such cases angles should be taken to several...means of checking the accuracy of the chart itself. If a round of angles can be taken the observer's accuracy is also checked. In tho case of ordinary... | |
 | United States. Hydrographic Office - 1915 - 418 Seiten
...fresh soundings or new buildings as additions to the chart, the sextant should invariably be used. In all such cases angles should be taken to several...means of checking the accuracy of the chart itself. If a round of angles can be taken the observer's accuracy is also checked. In the case of ordinary... | |
 | United States. Hydrographic Office - 1916 - 594 Seiten
...fresh soundings or new buildings as additions to the chart, the sextant should invariably be used. In all such cases angles should be taken to several...means of checking the accuracy of the chart itself. If a round of angles can be taken the observer's accuracy is also checked. In the case of ordinary... | |
 | United States. Hydrographic Office - 1916 - 516 Seiten
...fresh soundings or new buildings as additions to the chart, the sextant should invariably be used. In all such cases angles should be taken to several...means of checking the accuracy of the chart itself. If a round of angles can be taken the observer's accuracy is also checked. In the case of ordinary... | |
 | United States. Hydrographic Office - 1916 - 576 Seiten
...fresh soundings or new buildings as additions to the chart, the sextant should invariably be used. In all such cases angles should be taken to several...means of checking the accuracy of the chart itself. If a round of angles can be taken the observer's accuracy is also checked. In the case of ordinary... | |
 | United States. Hydrographic Office - 1916 - 322 Seiten
...fresh soundings or new buildings as additions to the chart, the sextant should invariably be used. In all such cases angles should be taken to several...means of checking the accuracy of the chart itself. If a round of angles can be taken the observer's accuracy is also checked. In the case of ordinary... | |
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