Celestial Navigation for Yachtsmen by Mary BlewittCelestial Navigation for Yachtsmen by Mary Blewitt

Celestial Navigation for Yachtsmen

byMary Blewitt

Paperback | November 22, 1994

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There is deep mystery and profound satisfaction in finding your position on earth by reference to the sun, moon, and stars--not to mention profound relief when the GPS receiver stops working in mid-passage. That is why knowledge of celestial navigation is still a rite of initiation, and its practice still a favorite pastime among serious cruisers.

That this edition of Celestial Navigation for Yachtsmen should appear 44 years after the first British edition and 27 years after its first publication in the U.S. is eloquent testimony to the author's clear, concise explanation of a difficult skill. Through those years, Celestial Navigation for Yachtsmen has been the best-known, best-loved primer on the subject throughout the English-speaking world. It successfully teaches sailors who have been demoralized by bigger books. It remains "the famous little book" on celestial navigation.

Among other changes, this edition substitutes the Nautical Almanac for the Air Almanac, discusses the "short" tables based on H.O. 211, expands the discussion in a few areas, fine-tunes it in others, and shows how to advance a line of position for a running fix from sun sights. The only mathematics involved are straightforward addition and subtraction.

Celestial Navigation for Yachtsmen has spawned many imitators over the years, but it's still the best--with this new edition more than ever.

Mary Blewitt was involved with sailing for most of her life. Formerly a top ocean-racing navigator as well as secretary of the Royal Ocean Racing Club for a number of years, she was also chairman of Racing Rules Committee of the Royal Yachting Association.
Title:Celestial Navigation for YachtsmenFormat:PaperbackDimensions:112 pages, 8.4 × 5.5 × 0.2 inPublished:November 22, 1994Publisher:McGraw-Hill Education

The following ISBNs are associated with this title:

ISBN - 10:0070059284

ISBN - 13:9780070059283

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Table of Contents



Editor's Note

The Theory

The Heavenly Bodies

The Geographical Position (GP)


Hour Angle

The Zenith

The Horizon


Zenith Distance

The Elevated Pole

Azimuth and Azimuth Angle

Great Circles

Universal Time (UT)

The Position Line

Spherical Triangles

The Intercept

Sextant Altitude and Observed Altitude

Dip; Refraction; Semi-Diameter; Parallax

The Practice

Almanacs and Tables

Almanacs; Sight Reduction Tables

A Sun Sight in Winter

Using the Sextant; Recording the Sights; Correcting the Data; Using the Almanac; Using the Tables; Plotting the Sight

A Sun Sight in Summer

A Moon Sight

A Running Fix

Planet Sights

Meridian Sights

Star Sights

Sidereal Hour Angle; Declinations; Twilight and Preparation of Star Sights; Using the Meridian Passage

Pole Star Sights




"Short" Sight Reduction Tables

Practice Sights

Plotting Sheets


A. Nautical Almanac, 1990, for December 6, 7, 8

B. Nautical Almanac, 1990, for July 15, 16, 17

C. Nautical Almanac, Increments and Corrections for 56m and 57m

D. Nautical Almanac, Altitude Correction Tables, 10 degrees - 90 degrees - Sun, Stars, Planets

E. Nautical Almanac, Altitude Correction Tables, 0 degrees - 35 degrees - Moon and 35 degrees - 90 degrees - Moon

F. H.O. 249 Vol. III for Lat. 52 degrees, Declination (15 degrees to 29 degrees) CONTRARY name to Latitude, LHA 69 to 0

G. H.O. 249 Vol. II or III, Table 5

H. Nautical Almanac, 1993, for October 10, 11, 12

I. H.O. 249 Vol. I, Epoch 1995.0, for LAT 33 degrees N, LHA Aries 0 to 179


Editorial Reviews

``For those interested in learning or brushing up on their celestial skills. . .not much on theory, just how to do it.''