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The Complete On-Board Celestial Navigator

The Complete On-Board Celestial Navigator Cover


Synopses & Reviews

Publisher Comments:

The perfect backup navigation system for the serious cruiser in a GPS era, this all-in-one tool kit supplies everything a celestial navigator needs except the sextant. The Complete On-Board Celestial Navigator replaces $300 worth of guides and almanacs traditionally required by celestial navigators and includes a star finder; a five-year (2003­2007) nautical almanac for determining precise star, sun, moon, or planet locations at the time of sighting; and sight reduction tables for crunching the numbers and producing the fix. Designed with the novice or rusty celestial navigator in mind, it even includes a celestial navigation primer.

About the Author

Dr. George G. Bennett is the owner and director of CN Systems, which produces navigational calculator and computer software. The former head of the School of Surveying, Faculty of Engineering, at the University of New South Wales, Australia, he holds graduate degrees in surveying and geography. He has written extensively on geodesy, navigation, and surveying in international journals. An elected Fellow of the Institution of Surveyors and the Institute of Navigation, he has served as a visiting scientist at Her Majesty's Nautical Almanac Office at the Royal Observatory. He has sailed in nine Sydney - Hobart races as a navigator and has taught navigation at the Cruising Yacht Club of Australia and the Royal Sydney Yacht Squadron.

Table of Contents

How To Work a Sight—An Overview

1 Introduction

2 Scope and Contents

3 Equipment

3.1 Sextant

Perpendicularity Error
Side Error
Index Error

3.2 Clocks

4 Almanac Data

4.1 Stars and Aries

4.2 Sun and Planets

4.3 Moon

4.4 Summary

4.5 Alternative Interpolation Method

5 Planning and Observations

5.1 Planning

5.2 Sextant Observations

5.3 Identification

5.4 Observation Methods

5.5 Sunrise, Sunset, and Twilight

6 Sextant Altitude Corrections

6.1 Dip Correction

6.2 Index Correction

6.3 Star and Planet Corrections

6.4 Sun Correction

6.5 Moon Correction

6.6 Summary

7 The Marcq St. Hilaire Method

7.1 Intercept

7.2 Azimuth

Azimuth Tables
Weir Diagrams

7.3 The Position Fix

8 Amplitudes

9 Polaris

9.1 Azimuth

9.2 Latitude

10 Sun Observations

10.1 Running Fixes

10.2 Meridian Observations

11 Sight Reduction at Very Low Altitudes

Tables, Examples, and Forms

GHA Aries and Star Ephemerides

Sun and Planet Ephemerides

Sun and Planet Interpolation and Altitude Corrections

Moon Ephemerides

Moon Declination Interpolation

Moon (GHA-GMT) Interpolation

Moon Altitude Corrections

Sextant Altitude Analysis Example

Prediction and Identification

LAT of Sunrise and Sunset

LAT of Civil Twilight

Sight Reduction Tables

Azimuth Tables

Weir Diagrams

Polaris (Latitude and Azimuth)

Change of Altitude in 5 Minutes of Time

Sight Reduction Example: Stars, Planet, and Moon

Running Fix Example: Sun

Alternative Interpolation Table (Calculator)

Form: Sextant Altitude Analysis

Form: Sight Reduction

Form: Sight Reduction (Plot)

The Navigational Stars


Conversion of Time to Arc

Product Details

Bennett, George G.
International Marine/Ragged Mountain Press International Marine/Ragged Mountain Press
Bennett, George C.
Camden, Me. :
Sailing - Navigation
Nautical astronomy
Navigation -- Handbooks, manuals, etc.
Astronomy - General
Edition Number:
Publication Date:
Spiral, comb or coil bound book
Grade Level:
Professional and scholarly
10.86x8.89x.78 in. 1.22 lbs.

Related Subjects

Transportation » Nautical » Navigation and Piloting

The Complete On-Board Celestial Navigator
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Product details 176 pages International Marine Publishing - English 9780070071100 Reviews:
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