New Method of Correcting Lunar Distances, and Improved Method of Finding the Error and Rate of a Chronometer by Equal Altitudes (Classic Reprint) - Softcover

Inhaltsangabe

Master lunar distance methods and chronometer checks, with practical steps you can use at sea
This edition presents a clear, step‑by‑step approach to correcting lunar distances and finding a chronometer’s true rate. It combines data preparation, corrections for altitudes and refraction, and cross‑checks against Greenwich time to improve navigation accuracy. The book emphasizes practical procedures you can follow in the field, using tables and tried‑and‑true techniques.

• How to prepare observation data, including correcting for instrument errors and horizon dip.


• Methods to compute true distances from moon, sun, planets, and stars using reductions and corrections.


• Procedures for estimating a chronometer error and validating it with lunar observations.


• Guidance on applying parallax, refraction, and compression corrections to reach the true distance.

Ideal for navigators and students of celestial navigation who want a hands‑on reference to lunar distances and chronometer testing using equal altitudes.

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