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 148
... daily variation ; but when the declination is decreasing , place the sign of subtraction ( - ) before it . 4. Under the daily variation place the hours and minutes of Greenwich time , and take from the table ( Table XXI A , Raper , or ...
... daily variation ; but when the declination is decreasing , place the sign of subtraction ( - ) before it . 4. Under the daily variation place the hours and minutes of Greenwich time , and take from the table ( Table XXI A , Raper , or ...
Página 149
... Daily var . Green . time Correction 21 ° 32 ′ 48 ′′ S. 21 22 30 S. - 10 18 2h 0m 165 log . 3674 1h 54m log . 11015 - O 49 log . 1'4689 13th , at noon 21 32 48 S. Red , decl . 21 31 59 S. Decl . , noon , 13th , 21 ° 32 ′ 48 ′′ S. , decr ...
... Daily var . Green . time Correction 21 ° 32 ′ 48 ′′ S. 21 22 30 S. - 10 18 2h 0m 165 log . 3674 1h 54m log . 11015 - O 49 log . 1'4689 13th , at noon 21 32 48 S. Red , decl . 21 31 59 S. Decl . , noon , 13th , 21 ° 32 ′ 48 ′′ S. , decr ...
Página 150
... Daily variation 23 42 log . 0055 29620 Green . time 22h 39m log . 0251 35544 11848 Correction 22 ' 22 " N. log . 0306 11848 Decl . 19th noon o 18 35 S. Red . Decl . о 3 47 N. Correction 6,0 ) 134,1 * 7860 22 ' 22 " Decl . 19th , at noon ...
... Daily variation 23 42 log . 0055 29620 Green . time 22h 39m log . 0251 35544 11848 Correction 22 ' 22 " N. log . 0306 11848 Decl . 19th noon o 18 35 S. Red . Decl . о 3 47 N. Correction 6,0 ) 134,1 * 7860 22 ' 22 " Decl . 19th , at noon ...
Página 151
... Daily variation 3 38 log . 8199 Green . time 22h 30m log . 0280 Correction 3 24 log . 8479 29th at noon 23 13 1 N , Red decl . 23 9 37 N. Decl . noon , June 29th , page II , N.A " 23 ° 13 ′ 1 ′′ N. , ( decreasing ) , H.D. 8 " 58 ...
... Daily variation 3 38 log . 8199 Green . time 22h 30m log . 0280 Correction 3 24 log . 8479 29th at noon 23 13 1 N , Red decl . 23 9 37 N. Decl . noon , June 29th , page II , N.A " 23 ° 13 ′ 1 ′′ N. , ( decreasing ) , H.D. 8 " 58 ...
Página 152
... daily change of hourly difference , and take proportionate parts of this change for middle time , which apply to hourly difference at noon of given day , adding when hourly difference is increasing , and subtracting when decreasing . Ex ...
... daily change of hourly difference , and take proportionate parts of this change for middle time , which apply to hourly difference at noon of given day , adding when hourly difference is increasing , and subtracting when decreasing . Ex ...
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).