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: Containing the Different Kinds of Sailing, and Necessary Corrections for Lee-way, Variation, &c. Exemplified in a Journal at Sea ... The Whole Illustrated with Engravings ...J. Johnson, 1807 - 328 sider |
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Side 22
... represent the index of a fraction , 10 will reprefent , in this cafe , the index of unity . Indeed the index of unity may be affumed either o , 10 , 100 , & c . as you pleafe ; but generally , for moft ufes , is not wanted to be more ...
... represent the index of a fraction , 10 will reprefent , in this cafe , the index of unity . Indeed the index of unity may be affumed either o , 10 , 100 , & c . as you pleafe ; but generally , for moft ufes , is not wanted to be more ...
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 ship fails from ; then , if the fhip's course 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 ship fails from ; then , if the fhip's course is to be fouth- ward , take ...
Side 66
... represent the meridian of the Lizard , and L the Lizard point ; on L defcribe the compass ; 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 compass ; 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 75
... represent the two meridians ; and then EQ reprefents the equa- tor , and P the pole . Again , with the fine com . of the lat . 49 30 ' , viz . 40 ° 30 ' in your compaffes , taken from the line of fines on the Plane Scale , and with one ...
... represent the two meridians ; and then EQ reprefents the equa- tor , and P the pole . Again , with the fine com . of the lat . 49 30 ' , viz . 40 ° 30 ' in your compaffes , taken from the line of fines on the Plane Scale , and with one ...
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The New Practical Navigator: Being a Complete Epitome of Navigation: To ... John Hamilton Moore Ingen forhåndsvisning tilgjengelig - 2015 |
The New Practical Navigator: Being a Complete Epitome of Navigation: To ... John Hamilton Moore Ingen forhåndsvisning tilgjengelig - 2015 |
Vanlige uttrykk og setninger
againſt alfo anchor Anfwer angle apparent altitude arch bafe baſe bearing cable cafe centre chord Co-fecant Co-fine Co-tang coaft column compaffes courfe courſe declination defcribe degrees departure diff difference of latitude difference of longitude Dift Dep Dift Lat diftance divifion draw eaft Epact equal extent will reach faid fails fame fathoms fcale fecond fhews fhip fhip's fhore fhould fide firft firſt fituation fome fouth fquare ftands ftar ftar's ftation fteer fubtract fuch fun's Funchal furface given Greenwich haul hypothenufe interfections laft lefs line of numbers logarithm maft meaſured meridian meridian altitude miles moon moon's muſt neareſt noon obferved oppofite parallax parallel perpendicular Plane Sailing quadrant radius reprefent right afcenfion right line rope Sailing Secant ſhip Sine ſtar Suppofe Tangent thefe theſe thofe thoſe triangle true uſed weft wind yards
Populære avsnitt
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 34 - Horizon decreafes ; confequently, the latitude of a place is always equal to the elevation of the pole above the Horizon.
Side 17 - ... degrees of the quadrant, begins at the right hand against 90° on the sines, and from thence is numbered towards the left hand thus : 10, 20...
Side 10 - C, it will become a line of versed sines, which may be continued to 180°, if the same divisions be transferred on the same 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 272 - ... home, when the rammer is to be drawn, and not before. While this is doing, the man appointed to...
Side xvi - The radius of a circle is half the diameter, or it is a right line drawn from the centre to the circumference, as CD.
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 87 - ... degrees, &c. and draw lines through every 5 degrees of latitude and longitude, as in the chart. Take from the Table of Latitude and Longitude of Places, the latitude and longitude of each particular place contained within the bounds of the chart, and lay a...
Side 17 - ... 1, 2, 3, &.C. to 10, and so on 20, 30, 40, and 45, where is a brass pin under 90° on the sines ; from thence it is numbered backwards, 50, 60, 70, 80, &.C. to 89, ending at the left hand where it began at 1 degree. The subdivisions are nearly similar to those of the sines. When you have any extent in your compasses, to be set off from any number less than 45°...
Side 21 - ... the logarithm of the firft term, the remainder will be the logarithm of the fourth term. Or to the complement arithmetic of the logarithm of the firft term, add the logarithms of the fécond and third term, the fum abating radius will give the fame anfwer. As log. .. 60 .... 1.77815 Coar.