A guide book to the Local marine board examination. The ordinary examination. [With] The requisite elements from the Nautical almanac for 1865, for the exercises in Ainsley's Guide book |
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Страница 41
... diff . 153 X 4 Mantissa of 2843 = 453777 Tab . diff . 153 X 4 = 612 + Characteristic 4 - 61 61,2 or 61 The log . of 284344453838 G We seek in the left hand column of the Table ON LOGARITHMS . 41.
... diff . 153 X 4 Mantissa of 2843 = 453777 Tab . diff . 153 X 4 = 612 + Characteristic 4 - 61 61,2 or 61 The log . of 284344453838 G We seek in the left hand column of the Table ON LOGARITHMS . 41.
Страница 45
... diff . 124 ) 7700 ( 62 744 260 248 Attaching this ( 62 ) to the four figures , we have 349162 , & c . But as the index is 3 , we obtain , by pointing off four figures to the left , 3491.62 the natural number sought . Given the ...
... diff . 124 ) 7700 ( 62 744 260 248 Attaching this ( 62 ) to the four figures , we have 349162 , & c . But as the index is 3 , we obtain , by pointing off four figures to the left , 3491.62 the natural number sought . Given the ...
Страница 46
... diff . 341 ) 3000 ( 008 2728 272 Therefore , 3104831 = log . of 1273'009 nearly . In dividing by tab . diff . we take remainder 3 and a cypher , then 341 in 30 goes no times , which we place down in the quotient , then taking another ...
... diff . 341 ) 3000 ( 008 2728 272 Therefore , 3104831 = log . of 1273'009 nearly . In dividing by tab . diff . we take remainder 3 and a cypher , then 341 in 30 goes no times , which we place down in the quotient , then taking another ...
Страница 51
... Diff . stands 52 , which multiplied by the remaining figures of the nat . number , viz . , 72 produces 3744 ; then ... diff . 52 Diff . for 72+ X 72 4 . Divide 69120 by 36 . 69120 log . 4839604 36 log . 1'556302 1920 log . 3.283302 5 ...
... Diff . stands 52 , which multiplied by the remaining figures of the nat . number , viz . , 72 produces 3744 ; then ... diff . 52 Diff . for 72+ X 72 4 . Divide 69120 by 36 . 69120 log . 4839604 36 log . 1'556302 1920 log . 3.283302 5 ...
Страница 52
... diff . 390 Diff . for 68 +265 X 68 045979 3120 2340 265,20 111168 log . 5045979 288 log . 2'459392 Quotient 3860 log . 2.586587 8. Divide 26843 by ' 03010 . 9 . Divide 579416 by 4324 . Log . 2684 428782 tab . diff . 162 Log . of 5794 ...
... diff . 390 Diff . for 68 +265 X 68 045979 3120 2340 265,20 111168 log . 5045979 288 log . 2'459392 Quotient 3860 log . 2.586587 8. Divide 26843 by ' 03010 . 9 . Divide 579416 by 4324 . Log . 2684 428782 tab . diff . 162 Log . of 5794 ...
Чести термини и фразе
A.M. at ship acct altitude sun's L.L. anchor bearing by compass charter-party chronometer column common logarithms compass course cosec cosine course and distance cyphers daily decimal point decl declination deviation difference of latitude difference of longitude dunnage East equator error EXAMINATION EXAMPLES FOR PRACTICE eye 18 feet fast fathoms fixed light Flags given Green Greenwich date Greenwich mean haul height of eye helm high water hour-angle Hourly diff index corr index correction June leeway London Bridge longitude by chronometer mantissa master miles minutes Multiply Nautical Almanac Norie North observed altitude sun's observed meridian altitude P.M. tides parallel sailing Polar dist port Raper required the latitude Rule sail secant Semi-diameter semid set by compass sextant side Signal sine South starboard subtract True altitude true azimuth true course Variation 2 points vessel West wind yard
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Страница 302 - ... abaft the beam on the starboard side, and of such a character as to be visible at a distance of at least two miles.
Страница 309 - The said green and red side lights shall be fitted with inboard screens projecting at least three feet forward from the light, so as to prevent these lights from being seen across the bow.
Страница 302 - On the starboard side a green light so constructed as to show an unbroken light over an arc of the horizon of...
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