Newton's Guide to the Board of trade examinations of masters and mates of sailing ships and steam ships, in navigation and nautical astronomyJ. Newton, 1884 - 176 páginas |
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Página 7
... DEVIATION OF THE COMPASS . FOR MASTERS . The Candidate is to answer correctly at least eight of such of the ... required . Ship's Head Bearing of distant by Standard object by Standard Compass . Compass . Deviation required . North N.E. ...
... DEVIATION OF THE COMPASS . FOR MASTERS . The Candidate is to answer correctly at least eight of such of the ... required . Ship's Head Bearing of distant by Standard object by Standard Compass . Compass . Deviation required . North N.E. ...
Página 9
... required to construct a deviation curve upon a Napier's diagram supplied by the Examiner . THE ANSWERS TO THE FOREGOING QUESTIONS . I. Deviation is that error of the compass caused by the attractive force of the iron in the build of the ...
... required to construct a deviation curve upon a Napier's diagram supplied by the Examiner . THE ANSWERS TO THE FOREGOING QUESTIONS . I. Deviation is that error of the compass caused by the attractive force of the iron in the build of the ...
Página 11
... required to draw diagrams similar to those which follow , showing the positions in which the bar magnets and soft ... deviation caused by sub - permanent magnetism . In Fig . I the ship's head is placed correct magnetic North . The North ...
... required to draw diagrams similar to those which follow , showing the positions in which the bar magnets and soft ... deviation caused by sub - permanent magnetism . In Fig . I the ship's head is placed correct magnetic North . The North ...
Página 12
... deviation arising from induced magnetism in horizontal soft iron . The ship's head is placed at one of the ... required , taking care to have the N. or S. end uppermost , according as the N. or S. end of the compass needle is drawn to ...
... deviation arising from induced magnetism in horizontal soft iron . The ship's head is placed at one of the ... required , taking care to have the N. or S. end uppermost , according as the N. or S. end of the compass needle is drawn to ...
Página 21
... Deviation to the Right hand ; Westerly Deviation to the Left hand . After which allow the Variation : - Easterly ... required . When all these courses are correctly found , they are entered to the nearest degree into the Traverse Table ...
... Deviation to the Right hand ; Westerly Deviation to the Left hand . After which allow the Variation : - Easterly ... required . When all these courses are correctly found , they are entered to the nearest degree into the Traverse Table ...
Términos y frases comunes
ADDITIONAL FOR MASTER Altitude was taken Azimuth and Error Ballycastle Bay Bearing of distant bore by compass Chronometer showed common logarithms Comp Compass bearings compass course correct mag correct magnetic bearing correct magnetic courses course and distance course to steer current set Dist distant object eye 19 feet eye 20 feet Find the course Find the ship's following courses Greenwich Mean height of eye Index Error line of position Long Longitude by Chronometer MATE mean noon miles per hour noon at Greenwich object by Standard observed altitude observed meridian altitude parallel sailing required the deviation Required the Latitude Required the true second Altitude sextant ship being supposed ship in lat Ship's Head Bearing ship's position Standard Compass Standard object steer by compass steered the following subt subtract Sumner's Method sun's bearing Sun's L. L. sun's lower limb supposing the variation thence the deviation true amplitude true azimuth ΙΟ
Pasajes populares
Página 76 - 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 146 - 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 138 - 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 147 - 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.