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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Página 54
... sine , cosine , & c . , is found directly from the Tables , in which are registered the values of trigonometrical quantities . All the numbers must be understood as decimals . Thus , sine 7 ° 7 ' sine 59 40 cosine 15 30 = ' 123890 ...
... sine , cosine , & c . , is found directly from the Tables , in which are registered the values of trigonometrical quantities . All the numbers must be understood as decimals . Thus , sine 7 ° 7 ' sine 59 40 cosine 15 30 = ' 123890 ...
Página 55
Thomas Liddell Ainsley. 1 . EXAMPLES . Find the nat . sine of 12 ° 44 ′ 27 ′′ . Nat , sine 12 ° 44 ′ = 220414 473 X 27 Tab . diff . 100 , thus : - = + 128 100 220542 Ans . Sine 12 ° 44 ′ 27 ′′ 220542 2 . Find the nat . cosine of 31 ° 28 ...
Thomas Liddell Ainsley. 1 . EXAMPLES . Find the nat . sine of 12 ° 44 ′ 27 ′′ . Nat , sine 12 ° 44 ′ = 220414 473 X 27 Tab . diff . 100 , thus : - = + 128 100 220542 Ans . Sine 12 ° 44 ′ 27 ′′ 220542 2 . Find the nat . cosine of 31 ° 28 ...
Página 56
... sine Sine 47 ° 4 ' = 732156 Tab . diff . 327 327 ) 900 ( 3 " nearly ( additional seconds for nat . sine ) . 981 Ans . 47 ° 4 ' 3 " . The log . 732156 is sought for in Table XXVI , Norie , but as it cannot be found exactly , the next ...
... sine Sine 47 ° 4 ' = 732156 Tab . diff . 327 327 ) 900 ( 3 " nearly ( additional seconds for nat . sine ) . 981 Ans . 47 ° 4 ' 3 " . The log . 732156 is sought for in Table XXVI , Norie , but as it cannot be found exactly , the next ...
Página 57
... sine 160275637. If we calculate the logarithm of 0 275637 , we find that its value is ' 440338 ; if to this 10 is added , we find that Log . sine 16 ° 9'440338 . In trigonometrical operations this is convenient , but principally because ...
... sine 160275637. If we calculate the logarithm of 0 275637 , we find that its value is ' 440338 ; if to this 10 is added , we find that Log . sine 16 ° 9'440338 . In trigonometrical operations this is convenient , but principally because ...
Página 58
... sine , log . cosine , & c . Second , having given the log . sine , log . cosine , & c . , required the value of the angle in degrees , minutes , and seconds . RULE XXVI . If the angle whose logarithmic sine , tangent , & c . , it is ...
... sine , log . cosine , & c . Second , having given the log . sine , log . cosine , & c . , required the value of the angle in degrees , minutes , and seconds . RULE XXVI . If the angle whose logarithmic sine , tangent , & c . , it is ...
Términos y frases comunes
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
Pasajes populares
Página 303 - Vessels, be exhibited on their respective Sides in sufficient Time to prevent Collision, in such manner as to make them most visible, and so that the Green Light shall not be seen on the Port Side, nor the Red Light on the Starboard Side.
Página 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.
Página 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.
Página 302 - On the starboard side a green light so constructed as to show an unbroken light over an arc of the horizon of...
Página 302 - In the following rules every steam vessel which is under sail and not under steam is to be considered a sailing vessel, and every vessel under steam, whether under sail or not, is to be considered a steam vessel. The words "steam vessel" shall include any vessel propelled by machinery. A vessel is "under way...
Página 314 - Nothing in these rules shall exonerate any ship, or the owner, or master, or crew thereof, from the consequences of any neglect to carry lights or signals, or of any neglect to keep a proper look.out, or of the neglect of any precaution which may be required by the ordinary practice of seamen, or by the special circumstances of the case.
Página 309 - Whenever, as in the case of small vessels under way during bad weather, the green and red side lights cannot be fixed, these lights shall be kept at hand, lighted and ready for use : and shall, on the approach of or to other vessels, be exhibited on their respective sides in sufficient time to prevent collision, in such manner as to make them most visible, and so that the green light shall not be seen on the port side nor the red light on the starboard side, nor, if practicable, more than two points...
Página 303 - Lights required for other Vessels ; but shall, if they do not carry such Lights, carry a Lantern having a Green Slide on the One Side, and a Red Slide on the other Side ; and on the Approach of or to other Vessels, such Lantern shall be exhibited in sufficient time to prevent Collision, so that the Green Light shall not be seen on the Port Side, nor the Red Light on the Starboard Side.
Página 336 - The names of every seaman or apprentice who ceases to be a member of the crew, otherwise than by death, with the place, time, manner, and cause thereof.
Página 302 - ... which is under steam, whether under sail or not, is to be considered a ship under steam. Rules concerning Lights (a).