## Magnetism and Deviation of the Compass: For the Use of Students in Navigation and Science SchoolsLongmans, Green, and Company, 1876 - 126 páginas |

### Dentro del libro

Página 39

... head is brought to every point of the compass , this is called swinging her ; and care must be taken before a ship is swung to see that she is beyond ...

... head is brought to every point of the compass , this is called swinging her ; and care must be taken before a ship is swung to see that she is beyond ...

**Head by Standard**Compass . Simultaneous Bearings . From ON FINDING DEVIATION . 39. Página 40

For the Use of Students in Navigation and Science Schools John Merrifield. Ship's

For the Use of Students in Navigation and Science Schools John Merrifield. Ship's

**Head by Standard**Compass . Simultaneous Bearings . From Standard Compass on Board . From Shore Compass . O N. 28 30 W. Deviation of Standard Compass . 1 15 ... Página 41

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**Head**Bearing by**Standard**of Distant Compass . Object . O Deviation . 3 10 W. 2 35 E. 8 10 E. 13 10 E. 16 50 E. 19 30 E. 20 30 E. Ship's**Head**Bearing by**Standard**of Distant Compass . Object . o Deviation . N. 66 10 W. 3 10 E. N. 63 5 ... Página 42

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**standard**compass at the time the sight was taken gives the whole error of the compass for the particular position the ship's**head**was in at the time . Declination or variation charts will always give the amount of error due to that ... Página 63

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**Head**by the**Standard**Compass . North Deviation of the**Standard**Ship's**Head**by the**Standard**Compass . Deviation of the**Standard**Compass . South 3 10 E. N. by E. 2 35 E. S. by W. 0 5 E. NNE . 8 10 E. SSW . 3 0 W. NE . by N. 13 10 E. SW ...### Otras ediciones - Ver todas

### Términos y frases comunes

Agonic lines Answer Astronomer Royal athwartships attraction azimuth Bearings of Distant blue pole calculated caused change in deviation clinometer coefficient Compass Bearings compass course compass needle compensation construct a Napier's contrary name correct mag correct magnetic bearing cosine courses correct magnetic Courses sailed declinometer deviation for ship's deviation table dipping needle directive force directive power Distant Object duated earth east easterly deviation effects find the correct fluids following courses correct following Table find fore and aft Head by Standard heeling error hence horizontal force induced magnetism iron ship latitude magnetic equator magnetic meridian magnetic poles magnetised Napier's curve netic bearings Object by Standard opposite Plymouth produced quadrantal deviation rection red end right angles semicircular deviation standard compass subpermanent magnetism Suppose you steer table of deviations terrestrial terrestrial magnetism thence the deviation tion torsion balance variation vertical iron vertical line vessel westerly

### Pasajes populares

Página 113 - ... 16. State to which side of the ship, in the majority of cases, is the north point of the compass drawn in the northern hemisphere ; and what effect has it on the assumed position of the ship when she is steering on northerly, and also on southerly courses ? 17. The effect being as you state, on what courses would...

Página 65 - S2, etc., representing the sines of angles of 0°, lli°, 22^°, etc., remembering, however, that the cosine of an angle is the sine of its complement...

Página 10 - Hindoostan to Bombay; it then bends east, touches Australia, and goes south. In proceeding in either direction, east or west from the lines of no variation, the declination of the needle gradually increases, and becomes a maximum at a certain intermediate point between them. On the west of the eastern line the declination is west; on the east it is east. At...

Página 85 - has no hesitation in giving his own opinion, that the compasses used for directing the ship's course ought to be corrected, and that the efforts of scientific men ought to be directed mainly to the rendering this correction rigorously accurate, and easy of application.

Página 46 - ... exerted as a push. The single force which will produce the same effect upon a body as two or more forces acting together upon it is called their resultant.

Página 119 - B ? 14. If the value either of coefficient B or C be given, also the magnetic direction of the ship's head while she was being built, how by the traverse tables would you determine the approximate value of the other coefficient C or B ; and if the value of both these coefficients be given, how would you determine approximately the direction, by compass, of the ship's head whilst being built?

Página 114 - Northern hemisphere ; and what effect has it on the assumed position of the Ship when she is steering on Northerly, and also on Southerly courses ? 17. — The effect being as you state, on what courses would you keep away, and on what courses would you keep closer to the wind, in order to make good a given Compass course ? 18.

Página 105 - Supposing you have steered the following courses by the Standard Compass, find the correct magnetic courses made from the above deviation table.

Página 123 - ART. 82. 45. Given the heel, the direction of the ship's head by compass, and the heeling error observed, to find the approximate heeling error, with a greater or less given heel, and with the ship's head on some other named point of the compass, the ship's magnetic latitude being in both cases the same.

Página 108 - Deviations" which heretofore formed part of Form Exn. 7, the questions contained in the following list (B.) have been substituted. Candidates for Certificates of Competency as Masters Ordinary will be required to answer at least eight of such of these questions as may be marked with a cross by the Examiner. Candidates for First Class Certificates (Masters Extra) will be required to answer the whole of these questions.