Pugsley's Latitude by Meridian Altitude of the Sun and Fixed Stars: With Complete Rules and Explanations as Required at the United States Local Inspectors Examinations; an Examination Specialty |
Common terms and phrases
A.M. portion altitude and take apparent altitude astronomical date Auriga Capella bearing was south chief mate civil date coastwise steam vessels deck department declination is north declination is taken Enter Table 14 Enter Table 20A EXPLANATION The star's feet and take Find the latitude fixed star gives the zenith giving the apparent giving the true Greenwich instant Greenwich mean noon height of eye hourly difference inspectors instant of observation limb was observed local apparent longitude mean sun Mean time star's named north Nautical Almanac observed altitude observed meridian altitude observer's meridian parallax passes the meridian PUGSLEY'S sidereal sidereal day star is observed star passes star's bearing star's declination Star's hour angle star's meridian passage Star's R. A. Star's R. A. page star's right ascension subtracted from 90 sun's declination sun's lower limb sun's right ascension taken from page third mate true altitude subtracted wind zenith distance
Popular passages
Page 236 - In obeying and construing these rules due regard shall be had to all dangers of navigation and collision, and to any special circumstances which may render a departure from the above rules necessary in order to avoid immediate danger.
Page 221 - On the starboard side a green light so constructed as to show an unbroken light over an arc of the horizon of ten points of the compass, so fixed as to throw the light from right ahead to two points abaft the beam on...
Page 222 - ... in a vertical line one over the other, not less than six feet apart, and of such a character as to be visible all around the horizon at a distance of at least two miles...
Page 236 - My engines are going at full speed astern." PRECAUTION. ART. 29. Nothing in these rules shall exonerate any vessel, 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 lookout, 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.
Page 230 - ... feet above the hull, one such light, and at or near the stern of the vessel, and at such a height that it shall be not less than fifteen feet lower than the forward light, another such light. The length of a vessel shall be deemed to be the length appearing in her certificate of registry...
Page 224 - ... mile, or a combined lantern showing a green light and a red light from right ahead to 2 points abaft the beam on their respective sides. Such lantern shall be carried not less than 3 feet below the white light.
Page 234 - ... 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.
Page 224 - ... 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...
Page 228 - A vessel under one hundred and fifty feet in length when at anchor shall carry forward, where it can best be seen, but at a height not exceeding twenty feet above the hull, a white light, in a lantern so constructed as to show a clear, uniform, and unbroken light visible all around the horizon at a distance of at least one mile.
Page 232 - ... (c) A sailing vessel under way shall sound, at intervals of not more than one minute, when on the starboard tack one blast, when on the port tack two blasts in succession, and when with the wind abaft the beam three blasts in succession.