A Textbook on Coast and Lake Navigation: International Correspondence Schools, Scranton, Pa. ...International textbook Company, 1902 |
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Αποτελέσματα 1 - 5 από τα 41.
Σελίδα 2
... departure from the true spherical form is so trifling and inconsiderable that no practical error can result from treating the earth as a perfect sphere when laying down positions and framing directions for sailing over its surface . The ...
... departure from the true spherical form is so trifling and inconsiderable that no practical error can result from treating the earth as a perfect sphere when laying down positions and framing directions for sailing over its surface . The ...
Σελίδα 15
... departure is the distance made good by the ship due east or due west , or the distance between any two places measured on one of their parallels . The departure is usually expressed in miles . In order to more fully explain the fore ...
... departure is the distance made good by the ship due east or due west , or the distance between any two places measured on one of their parallels . The departure is usually expressed in miles . In order to more fully explain the fore ...
Σελίδα 29
... ( Departure ) ( Diff of Lat ) ( Distance ) Course FIG . 19 We do not , therefore , assume that the surface actually sailed upon is a plane , with the meridians parallel straight- lines ; but , for reasons mentioned above , we find that we ...
... ( Departure ) ( Diff of Lat ) ( Distance ) Course FIG . 19 We do not , therefore , assume that the surface actually sailed upon is a plane , with the meridians parallel straight- lines ; but , for reasons mentioned above , we find that we ...
Σελίδα 30
... departure . The same thing . will occur when the ship sails from a to d , or from a to e , or in any other direction , except when the course is true north and south , or true east and west . Hence , in plane sailing , we have only a ...
... departure . The same thing . will occur when the ship sails from a to d , or from a to e , or in any other direction , except when the course is true north and south , or true east and west . Hence , in plane sailing , we have only a ...
Σελίδα 31
... departure are 39.9 and 26.7 , respectively . The required difference of latitude is therefore 39.9 miles south , and the departure 26.7 miles west , because the course steered was south and west . Then in order to find the latitude in ...
... departure are 39.9 and 26.7 , respectively . The required difference of latitude is therefore 39.9 miles south , and the departure 26.7 miles west , because the course steered was south and west . Then in order to find the latitude in ...
Άλλες εκδόσεις - Προβολή όλων
A Textbook on Coast and Lake Navigation, Τόμος 2 International Correspondence Schools Πλήρης προβολή - 1902 |
Συχνά εμφανιζόμενοι όροι και φράσεις
according applied azimuth barometer binnacle boats chart chip log column Comp compass bearing compass course Consult Art correct magnetic bearing corresponding course and distance departure Diff difference of latitude difference of longitude direction distance run east easterly equator error EXAMPLE feet Find the difference Find the true follows given glass Grand Marais harbor Hence horizontal Hydrographic Office index bar indicated instrument knots Lake Huron LAKE NAVIGATION latitude and longitude latitude parallels leeway light lighthouse magnetic course means measured meridian method minutes nautical miles object observer parallel ruler parallel sailing pass patent log plane sailing polarity pole port position propeller quadrantal revolutions per minute rhumb line rule screw sextant ship ship's head shore shown in Fig side soft iron SOLUTION speed standard compass starboard statute miles steam vessel steamer steered surface tion Traverse Tables true course variation westerly wind
Δημοφιλή αποσπάσματα
Σελίδα 36 - On the starboard side a green light so constructed as to show an 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 two points abaft the beam...
Σελίδα 35 - ... (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...
Σελίδα 39 - 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.
Σελίδα 30 - ... when she shall have arrived within half a mile of such curve or bend, shall give a signal by one long blast of the...
Σελίδα 31 - ... shall be deemed to be an overtaking vessel; and no subsequent alteration of the bearing between the two vessels shall make the overtaking vessel a crossing vessel within the meaning of these rules, or relieve her of the duty of keeping clear of the overtaken vessel until she is finally past and clear.
Σελίδα 31 - 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.
Σελίδα 36 - ... points abaft the beam on the starboard side, and of such a character as to be visible at a distance of at least two miles.
Σελίδα 39 - A vessel which is close-hauled on the port tack shall keep out of the way of a vessel which is close-hauled on the starboard tack. (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.
Σελίδα 11 - ... a bright white light, so constructed as to show an unbroken light over an arc of the horizon of 20 points of the compass, so fixed as to throw the light 10...
Σελίδα 51 - A man on shore beckoning by day, or two torches burning near together by night, will signify, " This is the best place to land." Any of these signals may be answered from the vessel as follows: In the daytime, by waving a flag, a handkerchief, a hat, or even the hand ; at night, by firing a rocket, a blue light, or a gun, or by showing a light over the ship's gunwale for a short time and then concealing it.