From the PREFACE.
THIS little work is not intended to supply any presumed deficiency in other books treating of the same subject, but to preserve one common method throughout and to omit all complicated mathematical formulae and calculations beyond the reach of men of limited education.
The most simple elements of navigation only are treated of, and the tables added to make the little work complete in everything necessary to navigate a vessel to any port of the globe.
By a study of no other instructions than those contained in this little treatise, the nautical apprentice can soon fit himself for promotion; the merchantman make himself competent to conduct his vessel to his destination; and the owner of a yacht, with a little trouble, become able to co-operate with his captain. Other works are intended for the use of accomplished mathematicians or experienced navigators.