This concise guide explains how to determine directions, measure azimuth, and account for magnetic deviation, using Plumb lines, star observations, and simple field setups. It blends practical techniques with essential astronomy concepts to help you work accurately in the field.

From setting up at a light and using visible stars to translate true bearings into magnetic readings, this edition presents a clear path for observers. You’ll also learn how different time systems relate to position and how to transform coordinates between earthly and celestial references. The material is written to support hands‑on work that can be completed in a short session with reliable results.

How to determine a line's true bearing and read its deviation on a compass
Step‑by‑step methods for observing stars and computing azimuths
Practical procedures for laying out meridian lines and using plumb lines

Ideal for readers of practical navigation and astronomy references who want a portable, workmanlike resource.

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