NavigationW. & R. Chambers, 1867 - 458 sider |
Inni boken
Resultat 1-5 av 100
Side 47
... angle , when the paper is so small that an arc cannot be drawn upon it with the radius of a common line of chords . Suppose it were required to set off an arc of 30 ° , from the point C of the small circle ABC . Take the radius DC in ...
... angle , when the paper is so small that an arc cannot be drawn upon it with the radius of a common line of chords . Suppose it were required to set off an arc of 30 ° , from the point C of the small circle ABC . Take the radius DC in ...
Side 48
... angle or arc may be measured -- namely , with c any radius describe an arc about the angular point ; set that radius ... angle . 108. NOTE . - When the angle to be protracted exceeds 60 ° , you must lay off 60 ° , and then the remaining ...
... angle or arc may be measured -- namely , with c any radius describe an arc about the angular point ; set that radius ... angle . 108. NOTE . - When the angle to be protracted exceeds 60 ° , you must lay off 60 ° , and then the remaining ...
Side 49
... angles are taken off the sines , tangents , or secants , according to the nature of the pro- portion . Thus , if in the triangle ABC we have given AB = 56 , AC 64 , and the angle ABC = 46 ° 30 ' , to find the rest . In this D case we ...
... angles are taken off the sines , tangents , or secants , according to the nature of the pro- portion . Thus , if in the triangle ABC we have given AB = 56 , AC 64 , and the angle ABC = 46 ° 30 ' , to find the rest . In this D case we ...
Side 50
... angles of plane triangles , some of them being already known . It is divided into two parts , right - angled and oblique - angled ; in the former case , one of the angles is a right angle or 90 ° ; in the latter , they are all oblique ...
... angles of plane triangles , some of them being already known . It is divided into two parts , right - angled and oblique - angled ; in the former case , one of the angles is a right angle or 90 ° ; in the latter , they are all oblique ...
Side 51
... angle is its difference from 180 ° . 116. In the adjoining figure , let AB be an arc , and AOB the corresponding angle at the centre ; then CB is the complemental arc , and COB is the complemental angle ; also BCD is the supplemental ...
... angle is its difference from 180 ° . 116. In the adjoining figure , let AB be an arc , and AOB the corresponding angle at the centre ; then CB is the complemental arc , and COB is the complemental angle ; also BCD is the supplemental ...
Andre utgaver - Vis alle
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...