 | John Frederick William Herschel - 1851 - 572 Seiten
...accordingly. When the ship is ready for sea, the observations which are directed in the Admiralty Instructions for ascertaining the deviations of the compass caused by the iron of the ship are to be made on board ; and when the ship is swung round for this purpose, the deviations... | |
 | 1861 - 460 Seiten
...Deviations of the Compass by the Length and Arrangement of tlic Coni pass Needles." Mr. Smith said : When the deviations of the compass, caused by the iron of a ship, are corrected by magnets of soft iron, in the way long ago proposed by the Astronomer Royal, the correction... | |
 | John Frederick William Herschel, Robert Main - 1859 - 496 Seiten
...below the horizon. Thus an Inclination of — 30° is equivalent to 30° South Dip. 9. The Decimation is measured by the azimuth compass, an instrument...directions are given at the close of Appendix No. 1. Local Attraction. 10. It has been found that the results of magnetic observations, whether of the declination,... | |
 | 1866 - 642 Seiten
...number of convenient graphic methods, are given in the "Admiralty Manual for ascertaining and applying the Deviations of the Compass caused by the Iron of a Ship." (London : Potter, 1863.) Practice in the Mercantile Marine. — In the mercantile marine there is no... | |
 | British Association for the Advancement of Science - 1861 - 144 Seiten
...deviations of the compass by the length and arrangement of thecompass needles." Mr. SMITH said : When the deviations of the compass, caused by the iron of a ship are corrected by magnets of soft iron, in the way long ago proposed by the Astronomer Royal, the correction... | |
 | 1864 - 578 Seiten
...die Fortschritte der Nautik interessirt. Die Schrift: Admiralty Manual for ascertaining and applying the Deviations of the Compass, caused by the iron of a Ship, by EF Evans, RN, FRS Superintendent of the compass Department of the Admiralty, and Archibald Smith,... | |
 | 1866 - 638 Seiten
...number of convenient graphic methods, are given in the "Admiralty Manual for ascertaining and applying the Deviations of the Compass caused by the Iron of a Ship." (London : Potter, 1863.) Practice in the Mercantile Marine. — In the mercantile marine there is no... | |
 | John Frederick William Herschel, Robert Main - 1871 - 420 Seiten
...accordingly. When the ship is ready for sea, the observations which are directed in the Admiralty Instructions for ascertaining the •deviations of the compass caused by the iron of the ship are to be made on board ; and when the ship is swung for this purpose, the deviations of the... | |
 | Bernhard von Poten - 1877 - 514 Seiten
...aufgehoben werden kann. — Airy, a treatise on magnetism; Admiralty Manual for ascertaining and applying the Deviations of the compass, caused by the iron of a ship by EF Evans and A. Smith. St. Aucklandsinseln: eine Inselgruppe, 240 Seemeilen sdl. von Neuseeland,... | |
 | Institution of Civil Engineers (Great Britain). Library - 1904 - 440 Seiten
...Iron Ships. AIRY, Sir GB 1865, p. 17. Various ways in which it affects the Compass. LYONS, 1884. Rules for ascertaining the Deviations of the Compass caused by the iron of a ship. ANONYMOUS, 1852, 1855, p. 52. Johnson and the Mariner's Compass. JOHNSON (Capt. EJ), 1848. App. 563.... | |
| |
... if the amount is large, the heeling error is corrected by the application of a vertical magnet. The whole process is described, and all the mathematical formula and arithmetical processes, and a number of convenient graphic methods, are given in the... 