PREFACE TO THE FIRST EDITION.

This work is intended as a Guide to the Officers of all grades of the Merchant Service, in the examinations they are required to undergo before the Local Marine Board. It will be issued in Two parts:—Part I containing what is termed the Ordinary Examination, and Partli containing the Extra Examination.

The present volume, which relates to the Ordinary Examination, contains model solutions of examples in the various problems required of Candidates when under Examination, with numerous Exercises to each Problem, together with a variety of Examination Papers. It also contains all requisite information respecting the Deviation of the Compass; Lights of the English, St. George's, and Bristol Channels, &c.; Stowage of Cargoes; Invoice; Charter Party; Bottomry Bonds, &c.

In the preparation of the articles on Seamanship, the following works have been consulted :-“The Kedge Anchor," by W. Brady, U.S.N.; “The Seaman's Friend," by R. H. Dana, jun; “The Sheet Anchor,” by Darcy Lever, Esq.; while my obligations to other works have been duly acknowledged. The works of ABBOTT, LEES, Steele, and M'Culloch, &c., are the authorities that have been consulted on the subjects of Charter Party, Bills of Lading, &c., &c.

South Shields, July roth, 1856.

ADVERTISEMENT

TO

THE NINETEENTH EDITION.

In this Edition of the “Guide Book,” the examples requiring the use of the Nautical Almanac have been adapted to the year 1872, while considerable additions have been made in various parts of the work, with a view to meet the present requirements of the Examinations.

T. L. A.

South Shields,

August 706, 1869.

ERRATA ET CORRIGENDA.

page 116."

Page 37, line 13 from bottom, for “ in stating" read “in seeking."

95, for “the Table, page 89 ” read “the Table, page 94.” , 118, line 13 from bottom, for “page 114" read “ » 173, Example 12, for “ March 64” read “

May 64." » 176, line 6 from top, for “ London A. M. tide" read “ London P.M. tide.” » 198, the index of log. sec. of lat. should be o not 3. 263, Example 11, line 9 from bottom, for “found to be 4" 28m” read

“ found to be 3h 38m.” , 263, Example 12, line 4 from bottom, for “observer” read “object.”

CONTENTS.

PAGE,

I

21

36

56

76
78

89

Notices of Examinations of Masters and Mates
Places and Days of Examinations

16
Exercises in the Simple Rules of Arithmetic

17
Decimal Fractions ..
On Logarithms ..
Tables of Natural Sines, &c.

54
Tables of Logarithmic Sines, &c.
Navigation-Definitions of, &c. ..

62
Preliminary Rules in Navigation—To Find Difference of Latitude

70
To Find Meridional Difference of Latitude 71
To Find the Latitude in

72
To Find Middle Latitude

73
To Find the Difference of Longitude 73
To Find the Longitude in

75
Correcting Courses-Leeway

Variation
Variation and Leeway

84
Local Deviation ..
On the Traverse Table

97
Traverse Sailing
Parallel Sailing ..

106
Middle Latitude Sailing

108
Mercator's Sailing
The Day's Work

117
The Conversion of Civil into Astronomical Time

141
The Conversion of Longitude into Time

142
The Conversion of Time into Longitude

143
On Finding the Greenwich Date

144
'To Reduce the Sun's Declination

147
To Find the Equation of Time

155
Correction of Sun's Observed Altitude
To Find the Latitude by Sun's Meridian Altitude

161
Variation by an Amplitude

168
On Finding the Time of High Water, Method I

174
Method II

179
By Admiralty Tide Tables

183
At Foreign Ports

186

100

IIO

158