Celestial Navigation by H. O. 249
By: by John E. Milligan.
Publisher: Cornell Maritime Press
Published: April 1, 1974
Place of publication: Cambridge, Md
Language: eng
Format: Paperback
Number of pages: 101
ISBN-13: 9780870331916
Subjects: Nautical astronomy.; Navigation.
Description: "Any kind of boating can be fun," the author points out, "racing around the marks, or coastwise cruising where there is almost always at hand visual reference ashore from which bearings can be taken for locating one's position and thus finding one's way home. Severing these ties with land, however, offers a new kind of fun, a new kind of freedom, a freedom from dependence on land." Here is a basic beginner's book, introducing the amateur to the tools, the vocabulary, and the techniques of celestial navigation. Among the recommended tools are the H. O. 249 tables, the most widely used among amateur navigators at sea because of their simplicity. The ability to determine one's position at sea both liberates the sailor from the land and enables him to find his way to his destination. If you can read, add and subtract, understand angles, and use a protractor, you can learn to navigate in your armchair or at sea from Celestial Navigation by H. O. 249.
Table of contents: title: INTRODUCTORY NOTE; title: CELESTIAL NAVIGATION FOR THE BEGINNER; label: I.
title: WHAT YOU WILL NEED; title: Time by Radio; title: Types of Sextants; title: Nautical Almanac; title: H.O. 249 Tables; title: Other Materials; label: II.
title: LANGUAGE; title: Latitude and Longitude; title: How Latitude is Plotted; title: How Longitude is Plotted; title: Declination (Dec.); title: Greenwich Hour Angle (GHA); title: Local Hour Angle (LHA); title: Greenwich Mean Time; title: Sidereal Hour Angle (SHA); title: Altitude (Alt.); title: Aenith; title: Zenith Distance (ZD); title: Azimuth (Zn); label: III.
title: TAKING A SIGHT; title: The Sextant; title: Altitude Corrections; title: Instrument Correction (IC); title: Height of Eye (Dip); title: Correction (Refraction, etc.); title: Additional Corrections; label: IV.
title: DETERMINING LATITUDE; title: Latitude Formula; title: Time of Noon; title: "d" Factor; title: Standard Times; title: Taking the Sight; label: V.
title: LINE OF POSITION (LP) - FIX; title: Step by Step to Line of Position; title: Work Sheet; label: VI.
title: PLOTTING A LINE OF POSITION (LP); title: Plot Sheet; title: The Problem Plot; label: VII.
title: FIX; title: Plot Sheet; title: Work Sheet; title: Plot Sheet; title: Almanac Page; title: Almanac Page; label: VIII.
title: OTHER MEMBERS OF THE SOLAR SYSTEM; title: Venus Work Sheet; title: Venus Plot; label: IX.
title: MOON; title: Work Sheet; title: Correction Tables; title: Plot; label: X.
title: STARS; title: Polaris; title: Polaris Tables; label: XI.
title: THE THREE STAR FIX; title: Star Work Sheet; title: Three Star Plot; title: Star Plot Using H.O. 249, Vol. II; label: XII.
title: A START IN STAR FINDING; label: XIII.
title: POLISHING YOUR SKILL; title: The Navigational Triangle; title: Computing Hc and Zn by Trigonometry; title: Other Information in Almanac; title: Refining the Noon Sight; title: The Direct Plot; title: H.O. 214; title: H.O. 229; label: APPENDIX
title: Table of Formulas; title: Abbreviations; title: Symbols