A Complete Epitome of Practical Navigation, and Nautical Astronomy: Containing All Necessary Instructions for Keeping a Ship's Reckoning at Sea, Volume 1Imray, Laurie, Norie and Wilson, 1917 - 595 pages |
From inside the book
Results 1-5 of 93
Page viii
... Apparent , Mean and Sidereal Time ; Equation of Time ; Civil and Astronomical Day ; Greenwich Date , etc. LONGITUDE ... Apparent or Sidereal Time ; To Convert Apparent to Mean Time and vice versa ; To Convert Greenwich Mean Time into ...
... Apparent , Mean and Sidereal Time ; Equation of Time ; Civil and Astronomical Day ; Greenwich Date , etc. LONGITUDE ... Apparent or Sidereal Time ; To Convert Apparent to Mean Time and vice versa ; To Convert Greenwich Mean Time into ...
Page 78
... apparent circle which limits or bounds the view of a spectator on the sea , the eye being always supposed in the centre of the horizon . This circle is divided into parts similar to the divisions on the Mariner's Compass . The ZONES ...
... apparent circle which limits or bounds the view of a spectator on the sea , the eye being always supposed in the centre of the horizon . This circle is divided into parts similar to the divisions on the Mariner's Compass . The ZONES ...
Page 147
... apparent altitude : therefore dividing by 2 will give the correct apparent altitude of the limb observed . When observing the moon , place a green shade in front of the horizon- glass ; you require no dark glasses . It is always ...
... apparent altitude : therefore dividing by 2 will give the correct apparent altitude of the limb observed . When observing the moon , place a green shade in front of the horizon- glass ; you require no dark glasses . It is always ...
Page 148
... apparent altitude . Thus , if we suppose the angle S H R , measured by a sextant , to be 70 ° , the altitude of the ... apparent altitude of the sun's lower limb . Observed angles of sun's lower limb 99 ° 20 ′ 15 ′′ " " " " " " 25 30 ...
... apparent altitude . Thus , if we suppose the angle S H R , measured by a sextant , to be 70 ° , the altitude of the ... apparent altitude of the sun's lower limb . Observed angles of sun's lower limb 99 ° 20 ′ 15 ′′ " " " " " " 25 30 ...
Page 164
... apparent progress of the tide - wave , as well as alphabetically , the time of high water on the days of full and change ; with the rise of the tide at springs and neaps . The United States Coast Survey publishes similar Tide Tables ...
... apparent progress of the tide - wave , as well as alphabetically , the time of high water on the days of full and change ; with the rise of the tide at springs and neaps . The United States Coast Survey publishes similar Tide Tables ...
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Other editions - View all
A Complete Epitome of Practical Navigation, and Nautical Astronomy ... John William Norie,J. W. Saul No preview available - 2018 |
A Complete Epitome of Practical Navigation, and Nautical Astronomy ... John William Norie,William Henry Rosser No preview available - 2018 |
A Complete Epitome of Practical Navigation, and Nautical Astronomy ... John William Norie,J W Saul No preview available - 2022 |
Common terms and phrases
apparent azimuth bearing centre chart chronometer circle co-latitude Co-sec column compass course Corr correction course and distance dead reckoning decl declination departure deviation Diff difference of latitude difference of longitude direction dist distance run earth east equal equator equinoctial Example feet given Greenwich date Greenwich mean heavenly body horizon hour angle index error interval leeway logarithm magnetic course meridian altitude middle latitude miles millibars moon moon's Nautical Almanac noon Northern Hemisphere observed altitude parallax parallel parallel sailing plane plane sailing point of Aries polar distance pole port position prime vertical refraction required the latitude right angles right ascension sailing set and drift sextant ship ship's head side sidereal star subtract tide Traverse Table triangle true altitude true course variation vernier vertical wind zenith distance ΙΟ
Popular passages
Page 223 - January 31, February 28, March 31, April 30, May 31, June 30, July 31, August 31, September 30, October 31, November 30, December 31.
Page 37 - The square described on the hypothenuse of a right-angled triangle is equivalent to the sum of the squares described on the other two sides.
Page 221 - Ascension, and the interval between the departure of any meridian from the mean Sun and its succeeding return to it is the duration of the mean solar day. Clocks and chronometers are adjusted to mean solar time ; so that a complete revolution (through 24 hours) of the hour hand of...
Page 26 - The circumference of a circle is divided into 360 equal parts, called degrees; each degree into 60 minutes ; each minute into 60 seconds.
Page 199 - The Ram, the Bull, the heavenly Twins, And next the Crab the Lion shines, The Virgin and the Scales ; The Scorpion, Archer, and He-goat, The Man that holds the watering-pot, And Fish with glittering tails.
Page 21 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Page 73 - The shortest DISTANCE between two points on the surface of a sphere is the arc of a great circle passing through those points.
Page 36 - Jf a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another ; and the exterior angle equal to the interior and opposite upon the same side ; and likewise the two interior angles upon the same side together equal to two right angles.
Page 161 - The relative effects of these two bodies on the oceanic waters are directly as their mass, and inversely as the square of their distance...
Page 36 - IF a straight line falling upon two other straight lines makes the exterior angle equal to the interior and opposite upon the same side of the line ; or makes the interior angles upon the same side together equal to two right angles ; the two straight lines shall be parallel to one another.