AND

NAUTICAL ASTRONOMY.

THE PRACTICAL PART;

CONTAINING

RULES FOR FINDING THE LATITUDE AND LONGITUDE, AND
THE VARIATION OF THE COMPASS.

Author of a work on "Plane and Spherical Trigonometry;" "Hand-book of the Stars;"
"Problems in Astronomy, Navigation, &c., with Solutions:" formerly Mathematical
Master in the Royal Military Academy, Woolwich; and an Examiner of Officers in
the Merchant Service in Nautical Astronomy, &c.

LONDON:

JOHN WEALE, 59, HIGH HOLBORN.
1853.

LONDON:

BRADBURY AND EVANS, PRINTERS, WHITEFRIARS.

Given lat. from and lat. in, to find true diff. lat.

Given lat. from and lat. in, to find merid. diff. lat.

Given lat. from and lat. in, to find middle lat.

Given long. from and long. in, to find diff. of long.

Given lat. from and true diff. lat., to find lat. in

Given long. from and diff. long., to find long. in.

Description of compass and log line

Correction of courses

Given compass course and variation, to find true course

Deviation of compass from local attraction

Given compass course, variation and deviation, to find true course.

Given true course, variation and deviation, to find compass course.

Given compass course, variation, deviation, and leeway, to find

true course.

Rules in Navigation.

I. Given lat. and long. in, to find course and distance (by meri-

dional parts)

II. Given course and distance, to find lat. and long. in (by meri-

dional parts).

III. Given lat. and long. in, to find course and distance (by middle

lat.)

IV. Given course and distance, to find lat. and long. in (by middle

VII. The day's work: to find place of ship

To find course and distance on a Mercator's chart

39

Examination papers in Navigation for practice

39