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Bøker Bok 110 av 20... or taking their difference when of contrary names ; the altitude to be reckoned...
" ... 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°... "
The New American Practical Navigator; Being an Epitome of Navigation ... - Side 158
av Nathaniel Bowditch - 1846 - 451 sider
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Epitome of the Art of Navigation; Or, a Short, Easy, and Methodical Way to ...

James Atkinson - 1765 - 447 sider
...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,...
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Epitome of the Art of Navigation: Or, A Short, Easy and Methodical Way to ...

James Atkinson - 1770 - 447 sider
...; 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...
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The Practical Navigator, and Seaman's New Daily Assistant: Being an Epitome ...

John Hamilton Moore - 1791 - 296 sider
...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...
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The New Practical Navigator: Being a Complete Epitome of Navigation: to ...

John Hamilton Moore - 1810 - 336 sider
...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...
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American Practical Navigator

1821
...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...
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The New American Practical Navigator: Being an Epitome of Navigation ...

Nathaniel Bowditch - 1826 - 617 sider
...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...
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A complete set of nautical tables

John William Norie - 1836
...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...
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The seaman's new daily assistant, exhibiting an easy and expeditious method ...

John William Norie - 1840
...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...
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New star tables, adapted to practical purposes for twenty-two years

Thomas Lynn - 1843 - 80 sider
...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...
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A new and complete epitome of practical navigation

John William Norie - 1852
...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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