Project Gutenberg's Lectures in Navigation, by Ernest Gallaudet Draper

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Title: Lectures in Navigation

Author: Ernest Gallaudet Draper

Release Date: December 28, 2008 [EBook #27642]

Language: English

Character set encoding: ASCII

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[Transcriber's Note:-
Words and phrases surrounded by underscores are italicised.
There are four symbols which are denoted by :-
(.) Circle surrounding a centred dot - Right Ascension of the
Meridian;
(+) Circle surrounding a cross - Earth's Central Progress;
(_) Circle with centre dot and line under - Observed altitude of sun's
lower limb;
-(-)- Circle with line through - True Altitude.
]

LECTURES IN NAVIGATION

Prepared for Use as a Text Book

at the

OFFICERS' MATERIAL SCHOOL
NAVAL AUXILIARY RESERVE

by

Lieutenant ERNEST G. DRAPER, U.S.N.R.F.

Head of the Department of Navigation

Officers' Material School, Naval Auxiliary Reserve

COPYRIGHT
BY
ERNEST G. DRAPER

FOREWORD

These Lectures have been compiled as speedily as possible to meet the
demand for some quick but fairly comprehensive method whereby large
bodies of men, divided into small classes, might learn the elements of
Navigation and thus assume, without delay, their responsibilities as
Junior Officers of the deck, Navigators and Assistant Navigators in the
United States Naval Auxiliary Reserve.

I realize that the haste with which the book has been written is
apparent in many places, and it is hoped that many evidences of this
haste will disappear in case further editions are printed. Besides
acknowledging the help and information which was secured from the list
of navigational works, mentioned on another page, I wish to mention
particularly Prof. Charles Lane Poor's book, entitled "Nautical
Science," from which was secured practically all of the information in
the Lecture on Planets and Stars (Tuesday--Week V); Commander W. C. P.
Muir's book, "Navigation and Compass Deviations," and Lieutenant W. J.
Henderson's