Navigation and Nautical Astronomy1861 |
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Page iv
... Greenwich time and longitude 398 65 66 III . To reduce degrees into time IV . To reduce time into degrees V. To find the Greenwich date ( first method ) VI . To find the Greenwich date ( second method ) STORE 66 67 69 70 71 Explanation ...
... Greenwich time and longitude 398 65 66 III . To reduce degrees into time IV . To reduce time into degrees V. To find the Greenwich date ( first method ) VI . To find the Greenwich date ( second method ) STORE 66 67 69 70 71 Explanation ...
Page 67
... Greenwich , obtained in this manner , is called an approximate Greenwich date , or more frequently the Greenwich date . To find the Greenwich date , we shall require the following rules for reducing degrees into time , and the converse ...
... Greenwich , obtained in this manner , is called an approximate Greenwich date , or more frequently the Greenwich date . To find the Greenwich date , we shall require the following rules for reducing degrees into time , and the converse ...
Page 69
... 52m 4s Ans . 58 ° 1 ′ 0 ′′ ( 16 ) 17 8 22 227 5 30 " " ( 17 ) 8h 17m 15.5s Ans . 124 ° IN NAUTICAL ASTRONOMY . 69 To reduce time into degrees To find the Greenwich date (first method) To find the Greenwich date (second method) STORE.
... 52m 4s Ans . 58 ° 1 ′ 0 ′′ ( 16 ) 17 8 22 227 5 30 " " ( 17 ) 8h 17m 15.5s Ans . 124 ° IN NAUTICAL ASTRONOMY . 69 To reduce time into degrees To find the Greenwich date (first method) To find the Greenwich date (second method) STORE.
Page 70
... Greenwich date , having given time at ship and the longitude . 1. Express the time at the ship astronomically ( p ... Greenwich date on the same day as at the ship . But if the sum be greater than 24 hours , reject 24 hours ; the result ...
... Greenwich date , having given time at ship and the longitude . 1. Express the time at the ship astronomically ( p ... Greenwich date on the same day as at the ship . But if the sum be greater than 24 hours , reject 24 hours ; the result ...
Page 71
... Greenwich dates . ( 21 ) Mar. 7 , at 3h 15m A.M. Long . 15 ° 45'E . Mar. 6 , at 14h 12m 29 ( 23 ) May 12 4 99 ( 24 ) ... Date . The Greenwich date is more correctly found by means of a chronometer , whose error on Greenwich mean time is ...
... Greenwich dates . ( 21 ) Mar. 7 , at 3h 15m A.M. Long . 15 ° 45'E . Mar. 6 , at 14h 12m 29 ( 23 ) May 12 4 99 ( 24 ) ... Date . The Greenwich date is more correctly found by means of a chronometer , whose error on Greenwich mean time is ...
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Common terms and phrases
24 hours altitude for index apparent altitude April 27 ascension mean sun astronomical celestial concave celestial equator chro chronometer showed colatitude compass course course and distance decl deviation diff difference of latitude east ecliptic Elements from Nautical find the latitude Greenwich date Greenwich mean noon haversines heavenly body height of eye horizontal parallax hour angle Index cor index correction July June latitude and longitude mean solar mean time nearly miles moon Moon's declination moon's semidiameter Nautical Almanac observed altitude observed meridian altitude P.M. mean Parallel Sailing pass the meridian point of Aries polar distance pole proportional logarithm refraction required the latitude required the longitude required the true Right asc Right ascension mean sea 20 feet ship mean ship's head sidereal spectator star subtract Sun's declination sun's L. L. sun's lower limb true altitude true bearing true course true distance versine zenith distance