A Treatise on Marine Surveying: Prepared for the Use of Younger Naval Officers, with Questions for Examination and Exercises, Principally from the Papers of the Royal Naval College, with the ResultsMacmillan, 1882 - 307 pages |
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A Treatise on Marine Surveying: Prepared for the Use of Younger Naval ... J. L. Robinson No preview available - 2018 |
Common terms and phrases
adjustment barometer base line bearing and distance bisect Buoy centre chords chronometer cliff coast computed correct difference divided divisions Draw earth equal error extend from lat feet fixed harbour height Hence High island high water hill horizontal inches instrument island islet known latitude length lighthouse limb longitude Lough Foyle low water lunitidal intervals marked mean measured Mercator's chart mercury Meridian Distance method miles Moon's transit Mulhacen natural scale nautical mile Neap Note object Observatory observed angles Ordnance Survey parallel plane port position of observation Projection Protract Protractor radius reading represent Result rise Rock awash sailed from lat screw segment sextant shew Ship sailed shoal side soundings South spherical excess Spring Tides station straight line Sun's surface taken telescope temperature Theodolite tidal tide gauge Tide Tables triangle true bearing Variation vernier circle Vide Windmill yards zero
Popular passages
Page 53 - ... the three angles of a triangle are together equal to two right angles, although it is not known to all.
Page 180 - It remains to be noticed that the direction of strong winds, as well as the varying pressure of the atmosphere, considerably affect both the times and the heights of high water. Thus in the North Sea a strong NNW gale and a low barometer raise the surface 2 or 3 feet higher...
Page 166 - The sphere of the attractive virtue which is in the moon extends as far as the earth, and entices up the waters ; but as the moon flies rapidly across the zenith, and the waters cannot follow so quickly, a flow of the ocean is occasioned in the torrid zone towards the westward.
Page 145 - Shew that, if each of the angles of a spherical triangle, whose sides are small when compared with the radius of the sphere, be diminished by one-third of the spherical excess, the triangle may be solved as a plane triangle whose sides are equal to the sides of the spherical triangle, and whose angles are these reduced angles.
Page xvi - Nautical Surveying,— Use of Charts ; Rating of Chronometers ; Determination of Meridian Distance ; Selection and Measurement of a Base Line ; Determination of Latitude, Longitude, and True Bearing ; Triangulation ; Levelling ; Soundings: Fixing Positions: Tide Gauge; Establishment oí the Port ..... 12. Instruments. — Construction and Use of Marine Barometer, Sextant. Artificial Horizon, Azimuth Compass, Theodolite, and Level . .
Page 15 - ... and strong rippling all round the edge, by which the bank may generally be discovered. Beyond this point the streams unite and flow on towards Howth and Lambay, growing gradually weaker as they proceed, until they ultimately expend themselves in a large space of still water situated between the Isle of Man and Carlingford.
Page 53 - The opposite angles of a quadrilateral inscribed in a circle are together equal to two right angles, with converse.
Page 189 - Portland, there are what are termed the first and sccunil high waters. This double high water is probably caused by the tidal stream at Spithead, for, as long as that stream runs strong to the westward the tide is kept up in Southampton water, and there is no fall of consequence until the stream begins to slack at Spithead, but when the stream makes to the eastward at Spithead the water falls rapidly at Southampton. After low water, the...
Page iii - Robinson. — TREATISE ON MARINE SURVEYING. Prepared for the use of younger Naval Officers. With Questions for Examinations and Exercises principally from the Papers of the Royal Naval College. With the results. By Rev. JOHN L. ROBINSON, Chaplain and Instructor in the Royal Naval College, Greenwich. With Illustrations. Crown 8vo. 7*.
Page 108 - P; now turn the upper limb half round, that is 180°, from its former position; then, if the bubble returns to the middle, the limb is horizontal in that direction; but if otherwise, half the difference must be corrected by the parallel plate-screws over which the telescope lies, and half, by elevating or depressing the telescope, by turning the tangent-screw...