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 159
... altitude . TO CORRECT THE SUN'S ALTITUDE . RULE LX . 1o . Correct the observed altitude of the sun for index error , if any . 2o . Subtract the dip answering to height of eye ( Table V , Norie , and Table XXX , Raper ) ; the remainder ...
... altitude . TO CORRECT THE SUN'S ALTITUDE . RULE LX . 1o . Correct the observed altitude of the sun for index error , if any . 2o . Subtract the dip answering to height of eye ( Table V , Norie , and Table XXX , Raper ) ; the remainder ...
Página 160
... altitude 39 20 I True altitude 39 20 7 Ex . 2. 1872 , June 18th , the observed altitude sun's L L. 71 ° 19 ' 20 " , index cor- rection + 3 ′ 46 ′′ , height of eye 18 feet : required the true altitude . Obs . alt . sun's L.L. 71 ° 19 ...
... altitude 39 20 I True altitude 39 20 7 Ex . 2. 1872 , June 18th , the observed altitude sun's L L. 71 ° 19 ' 20 " , index cor- rection + 3 ′ 46 ′′ , height of eye 18 feet : required the true altitude . Obs . alt . sun's L.L. 71 ° 19 ...
Página 161
... height of eye 17 feet . Obs . alt . sun's U.L. Index correction Dip 17 feet 12 51 35 12 ° 52 ′ 30 ′′ +310 Obs . alt . sun's U.L. Index correction 12 ° 52 ′ 30 ′′ + 310 12 55 40 4 5 Dip 12 55 40 3557 Ref . Par . + Correction altitude 12 ...
... height of eye 17 feet . Obs . alt . sun's U.L. Index correction Dip 17 feet 12 51 35 12 ° 52 ′ 30 ′′ +310 Obs . alt . sun's U.L. Index correction 12 ° 52 ′ 30 ′′ + 310 12 55 40 4 5 Dip 12 55 40 3557 Ref . Par . + Correction altitude 12 ...
Página 162
... altitude ( Rule LX , page 159 ) ; subtract true altitude from 90 ° : the result will be the true zenith distance ... height of eye 14 feet : required the latitude . The observation was made when the sun was on the meridian , that is ...
... altitude ( Rule LX , page 159 ) ; subtract true altitude from 90 ° : the result will be the true zenith distance ... height of eye 14 feet : required the latitude . The observation was made when the sun was on the meridian , that is ...
Página 163
... altitude of the sun's L L. 56 ° 56 ′ 56 " , bearing South ; index correction — 3 ′ 4 ′′ ; height of eye , 14 feet . Ship date , February 3d oh om os Long . 139 ° 42 ′ W. + 9 18 48 Greenwich date , Feb. 3 9 18 48 Decl . page I , N. A. ...
... altitude of the sun's L L. 56 ° 56 ′ 56 " , bearing South ; index correction — 3 ′ 4 ′′ ; height of eye , 14 feet . Ship date , February 3d oh om os Long . 139 ° 42 ′ W. + 9 18 48 Greenwich date , Feb. 3 9 18 48 Decl . page I , N. A. ...
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).