Position Finding By the Improved Sumner Method Contrasted With the New Navig
Position Finding By the Improved Sumner Method Contrasted With the New Navig
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In our eReader you can find the full English version of the book. Read Position Finding By the Improved Sumner Method Contrasted With the New Navig Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Position Finding By the Improved Sumner Method Contrasted With the New Navig
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Run west 5 i 26 E 75 21 30 E 30 W Long, at time of 2nd obsn. 75 21 o E Lat. (decl. ) o 6-9 S Z. D. O 30 as radius 2nd obsn.
H. M. S.
19 i 26 W or Long. 74 38' 30" E Chart position at 2nd obsn. Lat. O 14-2' N, Long. 174 59' 45" E.
Blackburne's and Westland's "Azimuth and Reduction Tables" (1908 edition).
50 FORMULAE FOR CALCULATION OF EX-MERIDIAN LATITUDE WHEN AZIMUTH IS KNOWN.
OWING probably to the fact that the great majority of the formulae given in books of navigation for the calculation of ...the latitude, when the sun or other celestial body is not on the meridian, only give a correct latitude when such body is fairly close to the meridian, a great many navigators have the impression on their minds that an observa- tion for latitude when outside the usually accepted ex-meridian limits is of no value. This is a mistake, as, if a true formula is used, a true latitude may always be obtained when the hour-angle, altitude, and declination of the body are correctly known. At sea, however, the correct hour-angle can only be obtained by observation, as the longitude of the ship is continually changing, but the latitude corresponding to an observation of any particular body at any given meridian can always be calculated, and the line of position plotted from this point, and by combination with any other observation of another body on a different bearing both the latitude and longitude are obtained.
What to read after Position Finding By the Improved Sumner Method Contrasted With the New Navig?
You can find similar books in the "Read Also" column, or choose other free books by Harold S Blackburne to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Run west 5 i 26 E 75 21 30 E 30 W Long, at time of 2nd obsn. 75 21 o E Lat. (decl. ) o 6-9 S Z. D. O 30 as radius 2nd obsn.
H. M. S.
19 i 26 W or Long. 74 38' 30" E Chart position at 2nd obsn. Lat. O 14-2' N, Long. 174 59' 45" E.
Blackburne's and Westland's "Azimuth and Reduction Tables" (1908 edition).
50 FORMULAE FOR CALCULATION OF EX-MERIDIAN LATITUDE WHEN AZIMUTH IS KNOWN.
OWING probably to the fact that the great majority of the formulae given in books of navigation for the calculation of ...the latitude, when the sun or other celestial body is not on the meridian, only give a correct latitude when such body is fairly close to the meridian, a great many navigators have the impression on their minds that an observa- tion for latitude when outside the usually accepted ex-meridian limits is of no value. This is a mistake, as, if a true formula is used, a true latitude may always be obtained when the hour-angle, altitude, and declination of the body are correctly known. At sea, however, the correct hour-angle can only be obtained by observation, as the longitude of the ship is continually changing, but the latitude corresponding to an observation of any particular body at any given meridian can always be calculated, and the line of position plotted from this point, and by combination with any other observation of another body on a different bearing both the latitude and longitude are obtained.
What to read after Position Finding By the Improved Sumner Method Contrasted With the New Navig?
You can find similar books in the "Read Also" column, or choose other free books by Harold S Blackburne to read onlineMoreLess
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