The New Practical Navigator: Being a Complete Epitome of Navigation to which are Added All the Tables Requisite for Determining the Latitude and Longitude at Sea ...J. Johnson, 1807 - 328 sider |
Inni boken
Resultat 1-5 av 7
Side 50
... represent the fenfible horizon ; and azimuth compass , to take the azimuth or amplitude of the fun , in order to know the variation of the magnetic needle ; maps and charts of the feas and lands , to- gether with the depth of water ...
... represent the fenfible horizon ; and azimuth compass , to take the azimuth or amplitude of the fun , in order to know the variation of the magnetic needle ; maps and charts of the feas and lands , to- gether with the depth of water ...
Side 54
... represent the north ; the lower part fouth ; the right hand eaft ; and the left west . Draw the north and fouth line to reprefent the meridian of the place the fhip fails from ; then , if the fhip's courfe is to be fouth- ward , take ...
... represent the north ; the lower part fouth ; the right hand eaft ; and the left west . Draw the north and fouth line to reprefent the meridian of the place the fhip fails from ; then , if the fhip's courfe is to be fouth- ward , take ...
Side 66
... represent the meridian of the Lizard , and L the Lizard point ; on L defcribe the compafs ; then fet off the oppofite point to the bearing of the Lizard ; the S. S. E. line LA , which make equal to 15 miles ; parallel to the S. E. line ...
... represent the meridian of the Lizard , and L the Lizard point ; on L defcribe the compafs ; then fet off the oppofite point to the bearing of the Lizard ; the S. S. E. line LA , which make equal to 15 miles ; parallel to the S. E. line ...
Side 87
... represent a true fea - chart , the parts of which bear the fame pro- portion to one another as the correfponding parts of the globe do ; and on which all the lines will be right lines ; having every pa- rallel of latitude on the globe ...
... represent a true fea - chart , the parts of which bear the fame pro- portion to one another as the correfponding parts of the globe do ; and on which all the lines will be right lines ; having every pa- rallel of latitude on the globe ...
Side 108
... of 14 degrees north , to 52 degrees north , and that fhall con- tain 25 degrees of longitude weft of the meridian of Greenwich . See the Chart , page 110 . Draw Draw a line to represent the meridian of Greenwich , 108 MERCATOR'S SAILING .
... of 14 degrees north , to 52 degrees north , and that fhall con- tain 25 degrees of longitude weft of the meridian of Greenwich . See the Chart , page 110 . Draw Draw a line to represent the meridian of Greenwich , 108 MERCATOR'S SAILING .
Innhold
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Vanlige uttrykk og setninger
againſt alfo anchor Anfwer angle apparent altitude arch bafe bearing becauſe cable cafe centre Co-fecant co-fine Co-tang coaft column compafs confequently correfponding courfe courſe declination defcribe degrees departure difference of latitude difference of longitude Dift Dep Dift Lat diftance divifion draw eaft Epact equator EXAMPLE faid fame fathoms fecant fecond fextant fhews fhip fhip's fhore fhould fide find the Diff firft fituation fome fouth ftands ftar fteer fubtract fuch fun's Funchal furface glafs Greenwich haul horizon interfections laft lefs line of numbers logarithm maft meaſured Mercator's Sailing meridian meridian altitude Middle Latitude miles moon moon's muſt neareſt noon obfervation oppofite parallax parallel perpendicular Plane Sailing quadrant radius reprefent right line rope ſhip Sine Suppofe Table Tangent thefe theſe thip thofe thoſe true ufed uſed weft wind yards zenith
Populære avsnitt
Side 2 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Side 16 - EXAMPLE. If the diameter of a circle be 7 inches, and the circumference 22, what is the circumference of another circle, the diameter of which is 14 inches ? Extend from 7 to 22, that extent will reach from 14 to 44 the same way.
Side 1 - ... are supposed to be divided into 360 equal parts, called degrees (marked ° ;) each degree into 60 minutes (marked ' ;) each minute into 60 seconds (marked ".) Hence a semicircle contains 180 degrees, and a quadrant 90 degrees. An Angle is the meeting of two lines in a point, as A (plate 1, fig. 2.) The point where they meet is called the angular point, and the lines AB and AC, are called sides or legs. A Right Angle is that which is made by one line perpendicular to another, or, when the angles...
Side 316 - ... home, when the rammer is to be drawn, and not before. While this is doing, the man appointed to...
Side 72 - SSE 32 miles— SSE I E. 27 miles— S. by E. 25 miles— S. 31 miles, and SSE 39 miles. Required the latitude the ship is in, and her departure from the meridian, with the course and distance to her intended port ? TRAVERSE TABLE.
Side 31 - ... SH is the complement of the arch AS ; SZ is the sine of the arch SH, or the co-sine of the arch AS. XXI. The VERSED SINE of an arch is that part of the diameter contained be*tween the sine and the arch ; thus RA is the versed sine of the arch AS, and DCR is the versed sine of the arch DHS.
Side 12 - ... line on the other side of the centre C. 6thly. From the centre C, through the several divisions of the quadrant BD, draw right lines till they cut the tangent ВТ; so will the line ВТ become a line of tangents.
Side 114 - ... These trade winds, on the American side, extend to 30, 31, or even 32 degrees of N. latitude, which is about 4 degrees farther than they extend on the African side. To the southward of the equator, the trade winds extend three or four degrees farther towards the coast of Brazil, on the American side, than they do near the Cape of Good Hope, on the African side. Between the latitude of 4 degrees N. and 4 degrees S., the wind always blows between the south and east ; on the African side the winds...
Side 16 - The solid content of any bale, box, chest, fcc. is found by extending from 1 to the breadth ; that extent will reach from the depth to a fourth number, and the extent from 1 to that fourth number will reach from the length to the solid content. EXAMPLE 1st.
Side 117 - These contrary winds do not shift from one point to its opposite all at once ; in some places the time of the change is attended with calms, in others by variable winds ; and it often happens on the...