 | James Atkinson - Navigation - 1765 - 504 pages
...in this Example 38d. a8m. 3. The Angle B a P the Amplitude, or the Cemplement 6f the Sun's Azimuth, from the North in North Latitude; and from the South in South Latitude; for the Angle P«O is the Azimuth from the North at Sun-rifing, and the Angle B a P is its Complement,... | |
 | James Atkinson - Navigation - 1770 - 514 pages
...; Half the Total of thefe four Logarithms, is the Sine of the Supplement of half the Sun's Azimuth from, the North, in North Latitude; and from the South, in South Latitude, But to find the Hour of the Pay it's thus 5 to the Complement Arithmetic of the Sines of the Complement... | |
 | John Hamilton Moore - Nautical astronomy - 1791 - 578 pages
...will give the Log. Confine of half the true Azimuth, which, being doubled, gives the true Azimuth, reckoned from the North in North Latitude, and from the South in South Latitude. Or thus: Add together The Loe;. Secant of the Latitude 1 T> • r>- .•_ • T j The Lof. Secant ot... | |
 | John Hamilton Moore - Nautical astronomy - 1810 - 662 pages
...logarithms will give the log.co-sirfe of half the true azimuth, which being doubled, gires the true azimuth, reckoned from the north in north latitude, and from the south in south latitude. NB The polar distance of the sun or star, is their distance from the nearest, or elevated pole : and... | |
 | Nautical astronomy - 1821 - 708 pages
...stopped, and the degree and parts of a degree which stand against the middle line of the stop, will be the magnetic azimuth of the sun at that time, which...alike applicable to the moon, planets, and stars. TO FIND THE TRUE AMPLITUDE., RULE. BIT LOGARITHMS — To tlie lop-secant of the latitude (rtjediiifr... | |
 | Nathaniel Bowditch - Nautical astronomy - 1826 - 732 pages
...and parts of a degree which stand against the middle line on the top will bo the magnetic amplitude of the sun at that time, which is generally reckoned from the castor west point of the compass. To observe an azimuth by an azimuth compass. Turn the compass round... | |
 | John William Norie - Nautical astronomy - 1836 - 510 pages
...exceeds 90°, it is to be taken from 180°, and reckoned from the opposite point of the horizon, that is, from the North in North latitude, and from the South in South latitude. Thus, having the time of the star's transit, or passage over the meridian, bj the table, and its meridian... | |
 | John William Norie - 1840 - 184 pages
...90°, it is to be taken from 180°, F and reckoned from the opposite point of the horizon, that is, from the north in north latitude, and from the south in south latitude. Thus having the time of the star's transit, or passage over the meridian, by the Table, and its meridian... | |
 | Thomas Lynn - 1843 - 230 pages
...the co-sine of half the true azimuth, which doubled gives the true azimuth accordingly ; to be always reckoned from the north in north latitude, and from the south in south latitude. Example.— Sept. 25th, 1844, latitude 15° 17' N. ; longitude 82Э Е. ; the sun's true altitude is... | |
 | John William Norie - Nautical astronomy - 1852 - 844 pages
...exceeds 90°, it is to be taken from 1J1O3, and reckoned from the opposite point of the horizon, that is, from the North in North latitude, and from the South in South latitude. Thus, having the time of the star's transit, or passage over the meridian, by the table, and its meridian... | |
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... or taking their difference when of contrary names ; the altitude to be reckoned from the south point of the horizon, when the latitude is north, and the contrary when south ; but when the sum exceeds 90°, it is to be taken from 180°... 
