Practice of navigation and nautical astronomy, 43권1872 - 571페이지 |
도서 본문에서
29개의 결과 중 1 - 5개
51 페이지
... lead sufficient to cause the log to float upright , with the point just at the surface of the water . Three holes are bored in it , and the ends of pieces of cords are rove through two of the holes , and made fast . 46. - LOG LINE . THE ...
... lead sufficient to cause the log to float upright , with the point just at the surface of the water . Three holes are bored in it , and the ends of pieces of cords are rove through two of the holes , and made fast . 46. - LOG LINE . THE ...
54 페이지
... lead over the weather quarter , and let about 15 fathoms of line run out . The line will then show the opposite point to the direction of the drift . 56. - TAKING A DEPARTURE , OR FINDING THE DISTANCE FROM SOME KNOWN OBJECT . In ...
... lead over the weather quarter , and let about 15 fathoms of line run out . The line will then show the opposite point to the direction of the drift . 56. - TAKING A DEPARTURE , OR FINDING THE DISTANCE FROM SOME KNOWN OBJECT . In ...
55 페이지
... lead is one of the most important of these means . ships are taken to their port in dark nights and thick weather , by attention to the lead and careful steering . The seamen who navigated the sailing colliers formerly , were expert in ...
... lead is one of the most important of these means . ships are taken to their port in dark nights and thick weather , by attention to the lead and careful steering . The seamen who navigated the sailing colliers formerly , were expert in ...
56 페이지
... lead . As an instance of the utility of the lead , a ship was bound to Newhaven , U.S. , and got on the American coast in thick weather . An observation for latitude had been obtained the previous day . As the ship neared the land , the ...
... lead . As an instance of the utility of the lead , a ship was bound to Newhaven , U.S. , and got on the American coast in thick weather . An observation for latitude had been obtained the previous day . As the ship neared the land , the ...
197 페이지
... lead at any place , and at any other time than low water of spring tides , will generally exceed the depth marked on the chart at that place . The annexed diagram will illustrate this fact . Let the line S represent the surface of the ...
... lead at any place , and at any other time than low water of spring tides , will generally exceed the depth marked on the chart at that place . The annexed diagram will illustrate this fact . Let the line S represent the surface of the ...
자주 나오는 단어 및 구문
A.M. at ship anchor azimuth backstays bearing by compass bills of lading Cape captain cargo chart charter Circle common logarithms Compass Course correct magnetic course Cosec Cosine Cotang course and distance decimal Declination Degrees Diff Difference of Latitude difference of longitude Dist dunnage East EXAMPLES fast for mean feet fore freight Frid given heeling error height of eye high water hour hour angle index error Latitude and Departure leeway Logarithmic Sines longitude by chronometer MATE mean noon Mercator chart miles noon at Greenwich North observed altitude observed meridian altitude parallel parallel ruler parallel sailing port required the latitude required the longitude required the true Right Ascension rope Rule sail Secant ship's head Signal South spars standard compass staysail steered subtract sun's lower limb Table Tangent Thur tide true course Tues Variation vessel West wind yard
인기 인용구
312 페이지 - ... abaft the beam on the starboard side, and of such a character as to be visible on a dark mght, with a clear atmosphere, at a distance of at least two miles. (c.) On the...
312 페이지 - ... where it can best be seen, but at a height not exceeding twenty feet above the hull, a white light in a globular lantern of eight inches in diameter, and so constructed as to show a clear uniform and unbroken light visible all round the horizon, and at a distance of at least one mile.
321 페이지 - On the starboard side, a green light so constructed as to show an uniform and unbroken light over an arc of the horizon of 10 points of the compass ; so fixed as to throw the light from right ahead to 2 points abaft the beam...
322 페이지 - 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. Art. 4. Steam ships when towing other ships shall carry two bright white mast-head lights vertically, in addition to their side lights, so as to distinguish them from other steam ships.
322 페이지 - 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.
312 페이지 - ... from right ahead to two points abaft the beam on the port side, and of such a character as to be visible at a distance of at least two miles.
312 페이지 - Miles: (c.) On the Port Side, a Red Light, so constructed as to show an uniform and unbroken Light over an Arc of the Horizon of 10 Points of the Compass; so fixed as to throw the Light from right ahead to 2 Points abaft the Beam...
313 페이지 - ... (c.) When both are running free, with the wind on different sides, the vessel which has the wind on the port side shall keep out of the way of the other.
311 페이지 - 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...
312 페이지 - ... 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.