NavigationW. & R. Chambers, 1867 - 458 páginas |
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Página vii
... Compass . Exercises ...... INSTRUMENTS USED IN NAVIGATION .. Variation of the Magnetic Needle .. On Leeway and Deviation of the Compass .. Exercises ......... 70 74 78 81 84 87 Page ON PLANE SAILING ... 90 Promiscuous Exercises on Plane.
... Compass . Exercises ...... INSTRUMENTS USED IN NAVIGATION .. Variation of the Magnetic Needle .. On Leeway and Deviation of the Compass .. Exercises ......... 70 74 78 81 84 87 Page ON PLANE SAILING ... 90 Promiscuous Exercises on Plane.
Página 36
... compass . If the radius AC be divided into 100 or 1000 , & c . equal parts , and the lengths of the several sines , tangents , and secants , corresponding to the several arches of the quadrant , be measured thereby , and these numbers ...
... compass . If the radius AC be divided into 100 or 1000 , & c . equal parts , and the lengths of the several sines , tangents , and secants , corresponding to the several arches of the quadrant , be measured thereby , and these numbers ...
Página 38
... compass , numbered from the left hand towards the right , with 1 , 2 , 3 , 4 , 5 , 6 , 7 , to 8 , where is a brass pin . This line is also divided , where it can be done , into halves and quarters . 82. Tangent rhumbs , marked T. R. ...
... compass , numbered from the left hand towards the right , with 1 , 2 , 3 , 4 , 5 , 6 , 7 , to 8 , where is a brass pin . This line is also divided , where it can be done , into halves and quarters . 82. Tangent rhumbs , marked T. R. ...
Página 48
... compass , it will give the chord of 20 ° ; and if the transverse of 20 ° and 20 ° be in like manner taken on the sines , it will be the sine of 20 ° ; and lastly , if the transverse distance of 20 ° and 20 ° be taken on the tangents ...
... compass , it will give the chord of 20 ° ; and if the transverse of 20 ° and 20 ° be in like manner taken on the sines , it will be the sine of 20 ° ; and lastly , if the transverse distance of 20 ° and 20 ° be taken on the tangents ...
Página 74
... COMPASS , which gives the direction of the ship's track . 160. The LOG consists of the log - ship and line . The log - ship is a thin wooden sector , of about five inches radius , the circular edge being loaded with lead to make it ...
... COMPASS , which gives the direction of the ship's track . 160. The LOG consists of the log - ship and line . The log - ship is a thin wooden sector , of about five inches radius , the circular edge being loaded with lead to make it ...
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Términos y frases comunes
anchor apparent altitude barometer called Cape Cape Clear centre chords chronometer column common logarithms corrected cosec course and distance course steered decimal departure dept difference of latitude difference of longitude dist distance sailed divided equation Example extent will reach find the course given GUNTER'S SCALE hence horizon hypotenuse index error latitude and longitude latitude arrived leeway line of numbers logarithms mast middle latitude miles moon's multiplied Nautical Almanac observed altitude October 20 parallax parallel Parallel Sailing perpendicular place of observation plane Plane Sailing points polar distance port tack quantities quotient radius required the course required the latitude required the true right ascension rope secant semidiameter sextant ship from latitude ship sails ship's side slider starboard tack subtract sun's declination tangent true altitude true course true distance variation vessel wind
Pasajes populares
Página 395 - 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 395 - In obeying and construing these rules due regard must be had to all dangers of navigation ; and due regard must also be had to any special circumstances which may exist in any particular case rendering a departure from the above rules necessary in order to avoid immediate danger.
Página 394 - Every steamship, when approaching another ship so as to involve risk of collision, shall slacken her speed, or if necessary stop and reverse ; and every steamship shall, when in a fog, go at a moderate speed.
Página 391 - ... abaft the beam on the starboard side, and of such a character as to be visible at a distance of at least 2 miles. (c.) On the...
Página 392 - ... 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 abaft the beam on their respective sides.
Página 392 - ... so constructed as to show a clear, uniform, and unbroken light visible all around the horizon at a distance of at least one mile.
Página 392 - 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 393 - Sailing pilot vessels shall not carry the lights required for other sailing vessels, but shall carry a white light at the masthead, visible all round the horizon, and shall also exhibit a flareup light every fifteen minutes.
Página 393 - When two steam vessels are meeting end on, or nearly end on, so as to involve risk of collision, each shall alter her course to starboard so that each may pass on the port side of the other.
Página 393 - Whenever there is a fog, whether by day or night, the fog signals described below shall be carried and used, and shall be sounded at least every five minutes, viz. : (a...