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Books Bücher 1 - 10 von 17 in The three-arm protractor or station pointer consists of a graduated brass circle...
" The three-arm protractor or station pointer consists of a graduated brass circle with one fixed and two movable radial arms, the three beveled edges of the arms, if produced, intersecting at the exact center of the instrument. The edge of the fixed arm... "
Bay of Bengal Pilot: Bay of Bengal and the Coasts of India and Siam ... - Seite 20
von United States. Hydrographic Office - 1916 - 492 Seiten
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The American Practical Navigator: Being an Epitome of Navigation and ...

Nathaniel Bowditch, George Wood Logan - 1906 - 652 Seiten
...station-pointer (see art. 432, Chap. XVII). Set the right and left angles on the instrument, and then move it over the chart until the three beveled edges pass...marked with a pencil point through the center hole. When the three-armed protractor is not at hand, the tracing-paper protractor will prove an excellent...
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United States Coast Pilot: Atlantic Coast. Part III. From Cape Ann ..., Teil 3

U.S. Coast and Geodetic Survey - 1912 - 166 Seiten
...case of a metal instrument, or the radial lines in the case of a transparent or celluloid instrument, pass respectively and simultaneously through the three objects. The center of the instrument will then mark'the slu'p's position, which may be pricked on the chart or marked with a pencil point through...
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North Sea Pilot (eastern Shores): From Dunkerque to the Skaw

United States. Hydrographic Office - 1915 - 391 Seiten
...short, by estimation, the data used being made a part of the record. Tidal streams. — In navigating coasts where the tidal range is considerable, especial...instance, the objects angled on are so near the observer t hat they are more or less hidden by the circle of the instrument. The xylonite protractor also permits...
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Bay of Biscay Pilot, West Coast of France and the North Coast of Spain from ...

United States. Hydrographic Office - 1915 - 605 Seiten
...to the shore is by plotting with a protractor, sextant angles between three well-defined objects on shore which are shown on the chart ; this method,...on are so near the observer that they are more or Icssliidden by the circle of the instrument. The xylonite protractor also permits the laying down for...
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North Coast of France Pilot: Including the Channel Islands

United States. Hydrographic Office - 1915 - 633 Seiten
...to the shore is by plotting with a protractor, sextant angles between three well-defined objects on shore which are shown on the chart; this method, based...some cases preferable to it, as when, for instance, theobjects angled on are so near the observer that they are more or lesshidden by the circle of the...
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British Columbia Pilot, Band 1

United States. Hydrographic Office - 1916
...angle or in laying it on the chart has a greater effect in misplacing the position the longer the lino to be drawn. On the other hand distant objects should...on are so near the observer that they are more or lesshidden by the circle of the instrument. The xylonite protractor also permits the laying down for...
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South America Pilot, Band 3

United States. Hydrographic Office - 1916
...angle or in laying it on the chart has a greater effect in misplacing the position the longer the lino to be drawn. On the other hand distant objects should...some cases preferable to it, as when, for instance, theobjects angled on are so near the observer that theyare more or less hidden by the circle of the...
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Africa Pilot, Band 1

United States. Hydrographic Office - 1916
...be used for direction, because less affected by a small error or change of position. The three -arm protractor or station pointer consists of a graduated...the objects angled on are so near the observer that theyare more or less hidden by the circle of the instrument. The xylonite protractor also permits the...
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American Practical Navigator: An Epitome of Navigation and Nautical Astronomy

Nathaniel Bowditch - 1916 - 836 Seiten
...station-pointer (see art. 428, Chap. XVII). Set the right and left angles on the instrument, and then move it over the chart until the three beveled edges pass...marked with a pencil point through the center hole. When the three-armed protractor is not at hand, the tracing-paper protractor will instance, when the...
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United States Coast Pilot: Atlantic Coast. Gulf of Mexico from Key West to ...

U.S. Coast and Geodetic Survey - 1916 - 169 Seiten
...case of a metal instrument, or the radial lines in the case of a transparent or celluloid instrument, pass respectively and simultaneously through the three...marked with a pencil point through the center hole. The tracing-paper protractor, consisting of a graduated circle printed on tracing paper, can be used as...
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