NavigationW. & R. Chambers, 1867 - 458 páginas |
Dentro del libro
Resultados 1-5 de 45
Página 40
... reach to the decimal required . Example . Required the decimal fraction equal to . Extend from 4 to 3 ; that extent will reach from 1 on the middle to 75 towards the left hand . The like may be observed of any other vulgar fraction . 89 ...
... reach to the decimal required . Example . Required the decimal fraction equal to . Extend from 4 to 3 ; that extent will reach from 1 on the middle to 75 towards the left hand . The like may be observed of any other vulgar fraction . 89 ...
Página 41
... reach from 14 to 44 the same way , 92. The superficial content of any parallelogram is found by extending from 1 to the breadth ; that extent will reach from the length to the superficial content . Example . Suppose a plank or board ...
... reach from 14 to 44 the same way , 92. The superficial content of any parallelogram is found by extending from 1 to the breadth ; that extent will reach from the length to the superficial content . Example . Suppose a plank or board ...
Página 42
... reach beyond the mark of 45 ° , you must see how far it extends beyond that mark , and set it off from 45 ° towards the left , and see what degree it falls upon , which will be the number sought , which must exceed 45 ° ; if , on the ...
... reach beyond the mark of 45 ° , you must see how far it extends beyond that mark , and set it off from 45 ° towards the left , and see what degree it falls upon , which will be the number sought , which must exceed 45 ° ; if , on the ...
Página 48
... reach to E , and CE will be the arc required . And by the converse operation any angle or arc may be measured -- namely , with c any radius describe an arc about the angular point ; set that radius trans- versely from 60 ° to 60 ...
... reach to E , and CE will be the arc required . And by the converse operation any angle or arc may be measured -- namely , with c any radius describe an arc about the angular point ; set that radius trans- versely from 60 ° to 60 ...
Página 94
... reach from the distance 488 to the departure 405.7 on the line of numbers . 2. Extend from radius or 8 points to 3 points , the comple- ment of the course , on the line SR ; that extent will reach from the distance 488 to the difference ...
... reach from the distance 488 to the departure 405.7 on the line of numbers . 2. Extend from radius or 8 points to 3 points , the comple- ment of the course , on the line SR ; that extent will reach from the distance 488 to the difference ...
Otras ediciones - Ver todas
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...