## Newton's Guide to the Board of trade examinations of masters and mates of sailing ships and steam ships, in navigation and nautical astronomy |

### Dentro del libro

Resultados 1-5 de 23

Página 2

THE

THE

**DECLINATION**of a celestial object is the arc of a celestial meridian between the equator and the object . 24. POLAR DISTANCE is the arc of a celestial meridian between the elevated pole and the object . 25 . Página 30

From the Nautical Almanac at the given month , and page 1 of that month , take out the sun's

From the Nautical Almanac at the given month , and page 1 of that month , take out the sun's

**declination**for the Greenwich day ... If the**declinations**are of the same names , subtract ; If the**declinations**are of different names , add . Página 31

Divide by 60 if necessary ; the result is the correction of the

Divide by 60 if necessary ; the result is the correction of the

**declination**.**Declination**increasing , add ( always ) ;**Declination**decreasing , subtract ( always ) . Note . - The**declination**in all other problems is corrected by one of ... Página 32

(

(

**Declination**corrected by Proportional Logs . ) d . h . m . S. 1885 , Sept. 22 Long . 169 ° 30 ' W. Obs . alt ... 40 ° 1 ' 20 " Long II 18 4 + 50 G.A.T. II 18 6,0167,8 o IO II 18 Dip ... -4 17 39 57 53 Refr . 8 Decl . Sep. Página 40

The result is the Greenwich Apparent Time or G. A. T. TO FIND THE

The result is the Greenwich Apparent Time or G. A. T. TO FIND THE

**DECLINATION**. - Proceed as in the Meridian Altitude of the Sun. TO FIND THE TRUE AMPLITUDE . — To the log 40 Examples for practice Variation of Compass by Amplitudes ...### Comentarios de la gente - Escribir un comentario

No encontramos ningún comentario en los lugares habituales.

### Términos y frases comunes

ADDITIONAL FOR MASTER ANSWERS apparent applied Bearing of distant bore by compass centre Chart Chronometer showed Comp Compass bearings Compass courses correct magnetic bearing correct magnetic courses course to steer current set Declination Dist distance distant object dividers East error EXAMPLE eye 19 feet eye 20 feet feet Find the ship's following courses given Greenwich height of eye Index Error July lead line of position Long Longitude MATE Mean mean noon miles per hour North object by Standard observed altitude observed meridian altitude parallel pass question required the deviation Required the Latitude Required the true result ship ship's head Ship's Head Bearing ship's position Ship’s slow South Standard Compass Standard object subtract Sumner's Method sun's lower limb supposing the variation tide true azimuth West Winds

### Pasajes populares

Página 74 - In the following table give the correct magnetic bearing of the distant object, and thence the deviation. 8. With the deviation as above, give the courses you would steer by the Standard Compass to make the following courses, correct magnetic : — . . 9.

Página 7 - Having determined the deviation with the ship's head on the various points of the compass, how do you know when it is easterly and when westerly ? 4.

Página 144 - Compass to make the following courses, correct magnetic. 9. Supposing you have steered the following courses by the Standard Compass, find the correct magnetic courses made from the above deviation table.

Página 136 - Ship's Head by Standard Compass. Bearing of distant object by Standard Compass. Deviation required. Ship's Head by Standard Compass.

Página 8 - Compasses of iron ships are more or less affected by what is termed the heeling error ; on what courses does this error vanish, and on what courses is it the greatest ? 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 13 - ... are the usual indications of a ship being on the line of progression of the centre of a Cyclone ? 5. What are the usual indications that a ship is (a) approaching the centre of a Cyclone ; fb) receding from it?

Página 8 - Q. 15. The compasses of iron ships are more or less affected by what is termed the heeling error. On what courses does this error vanish, and on what courses is it the greatest ? A.

Página 9 - 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 145 - Tenby, by reckoning took a cast of the lead. Required the correction to be applied to the depth obtained by the lead line before comparing it with the depth marked on the Chart.

Página 13 - And suppose that the wind during the passage of the same cyclone were found to change toward the* , what would be the ship's position with reference to the line of progression of the centre of the cyclone, and what action would you take ? 8.