Mrs. Janet Taylor's Hand-book [&c.].1865 |
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Página 7
... altitude of the sun , and to verify the result by Sumner's method . He must be able to calculate the altitudes of the sun , moon or star when they cannot be observed ... observed with an artificial horizon . He must understand how to observe ...
... altitude of the sun , and to verify the result by Sumner's method . He must be able to calculate the altitudes of the sun , moon or star when they cannot be observed ... observed with an artificial horizon . He must understand how to observe ...
Página 43
... observed altitude for index error , ( if any , ) dip , refraction , parallax , and semi - diameter , the result will be the true altitude of the sun's centre . Subtract this from 90 ° for the true zenith distance , which will be north ...
... observed altitude for index error , ( if any , ) dip , refraction , parallax , and semi - diameter , the result will be the true altitude of the sun's centre . Subtract this from 90 ° for the true zenith distance , which will be north ...
Página 46
... observed altitude 27 ° 20 ' index error -1'10 " , eye 20 feet . time by chronometer 30d 2h 25m 39s , which was 14m 45s slow on mean time at Greenwich , Oct. 17 , 1867 , and losing 1-2 daily : required the longitude . * Table 5 , in Mrs ...
... observed altitude 27 ° 20 ' index error -1'10 " , eye 20 feet . time by chronometer 30d 2h 25m 39s , which was 14m 45s slow on mean time at Greenwich , Oct. 17 , 1867 , and losing 1-2 daily : required the longitude . * Table 5 , in Mrs ...
Página 48
... altitude , and the given latitude , less radius , add the cosines of half sum and remainder . Half the sum of these ... observed altitude 39 ° 8′30 ′′ : index error + 32 " : eye 19 feet : sun's bearing by azimuth compass W. b S ...
... altitude , and the given latitude , less radius , add the cosines of half sum and remainder . Half the sum of these ... observed altitude 39 ° 8′30 ′′ : index error + 32 " : eye 19 feet : sun's bearing by azimuth compass W. b S ...
Página 49
... altitude of the Sun cannot be observed ; by this method the latitude may be obtained from the Sun's altitude , taken at an interval from noon , not exceeding the following limits , viz ; The number of minutes contained in the interval ...
... altitude of the Sun cannot be observed ; by this method the latitude may be obtained from the Sun's altitude , taken at an interval from noon , not exceeding the following limits , viz ; The number of minutes contained in the interval ...
Términos y frases comunes
according Additional allowed altitude Answers apparent apply assumed azimuth bearing boiler Book called cargo carry centre Certificate chronometer circle clear compass continued correct course cross cyclone damage dangerous declination departure determine diff difference direction dist distance Divide east engines equal equator Examination feet fixed freight give given greater Greenwich half hand head High Water hour hurricane index error keep latitude less Light logarithms longitude March Marine master Mate mean meridian method miles minutes Nautical Navigation necessary noon northern observed observed altitude Ordinary parallel pass port Questions reckoned Remarks required the latitude rule sailing ship ship's side star starboard steam storm sun's Table tack taken tide Trade true valves variation vessel voyage weather wind
Pasajes populares
Página 74 - 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 72 - A vessel which, is closehauled on the port tack shall keep out of the way of a vessel which is closehauled 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.
Página 99 - London, (the act of God, the queen's enemies, fire, and all and every other dangers and accidents of the seas, rivers, and navigation, of whatever nature and kind soever, excepted,) unto order or to assigns, he or they paying freight for the said goods at 51.
Página 73 - ... involve risk of collision, the steam ship shall keep out of the way of the sailing ship. Art. 16. Every steam ship, when approaching another ship so as to involve risk of collision, shall slacken her speed, or, if necessary, stop and reverse ; and every steam ship shall, when in a fog go at a moderate speed.
Página 76 - ... unless it is shown to the satisfaction of the Court that the circumstances of the case made a departure from the Regulations necessary.
Página 72 - If two ships under steam are meeting end on, or nearly end on, so as to involve risk of collision, the helms of both shall be put to port so that each may pass on the port side of the other.
Página 71 - Steamships, when towing other ships, shall carry two bright white masthead lights, vertically, in addition to their side lights, so as to distinguish them from other steamships.
Página 73 - 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 16 - The index of the logarithm of a number greater than unity, is one less than the number of digits in the integral part...
Página 71 - Ships, whether steam ships or sailing ships, when at anchor in roadsteads or fairways, shall, between sunrise and sunset, exhibit where it can best be seen, but at a height not exceeding 20 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.