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
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againſt alſo altitude anchor angle Anſwer arch baſe bearing becauſe beſt cable caſe chord cloſe co-fine Co-ſecant Co-tang coaſt column compaſs conſequently correſponding courſe degrees departure deſcribe diff of lat diff of long difference of latitude difference of longitude Diſ diſt diſtance diviſion eaſt equator extent will reach faſt fathoms fide firſt glaſs haul horizon hypothenuſe Iſland laſt leſs line of numbers logarithm longitude maſt meaſured meridian miles moon moon's moſt muſt neareſt obſerved oppoſite parallax parallel paſſing perpendicular Plane Sailing radius repreſent right line riſing rope ſaid Sailing ſails ſame ſcale ſea ſecant ſecond ſeen ſet ſeveral ſhe ſheet ſhews ſhip ſhip's ſhore ſhould ſide ſines ſmall ſome ſouth ſquare ſtands ſtar ſtation ſteer ſubtract ſuch ſum ſun ſun's Suppoſe ſurface tangent theſe thoſe uſed weſt weſtward wind yards
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 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 302 - ... home, when the rammer is to be drawn, and not before. While this is doing, the man appointed to...
Side 70 - 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 112 - ... 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.