NavigationW. & R. Chambers, 1867 - 458 sider |
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Side 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.
Side xi
... variation is westerly , but if to the left , the variation is easterly ; and its amount is the difference between the two . In the same manner may the variation be determined when the object observed is the moon , a star , or a planet ...
... variation is westerly , but if to the left , the variation is easterly ; and its amount is the difference between the two . In the same manner may the variation be determined when the object observed is the moon , a star , or a planet ...
Side 81
... VARIATION OF THE MAGNETIC NEEDLE . 169. The needle points to the magnetic north , which in most places does not agree with the true north : the difference ... variation Variation of the Magnetic Needle . 81 Variation of the Magnetic Needle.
... VARIATION OF THE MAGNETIC NEEDLE . 169. The needle points to the magnetic north , which in most places does not agree with the true north : the difference ... variation Variation of the Magnetic Needle . 81 Variation of the Magnetic Needle.
Side 82
... variation of the compass 2 easterly , to find the true course . Here the compass course is N. 4 W. , and the variation being easterly must be applied to the right , thereby bringing it 22 nearer to the north , that is , within two ...
... variation of the compass 2 easterly , to find the true course . Here the compass course is N. 4 W. , and the variation being easterly must be applied to the right , thereby bringing it 22 nearer to the north , that is , within two ...
Side 83
... variation of the compass , to find the compass course . RULE . If the variation be westerly , apply it to the right ; but if easterly , apply it to the left of the true course , and the point thus determined will be the compass course ...
... variation of the compass , to find the compass course . RULE . If the variation be westerly , apply it to the right ; but if easterly , apply it to the left of the true course , and the point thus determined will be the compass course ...
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Vanlige uttrykk og setninger
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
Populære avsnitt
Side 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.
Side 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.
Side 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.
Side 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...
Side 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.
Side 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.
Side 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.
Side 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.
Side 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.
Side 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...