Tables of Calculated Hour-Angles and Altitude Azimuth Table 30 N. To 30 S: Ex-Meridian Tables 60 N. To 60 S. And Calculated Reductions Ans Azimuths of ... to 3 Hours From Meridian (Classic Reprint) - Softcover

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Excerpt from Tables of Calculated Hour-Angles and Altitude Azimuth Table 30 N. To 30 S<br/><br/>The main purpose of these tables is to make as easy as possible the problem of finding the ship's position from combined altitudes of sun, moon, or stars, and especially to encourage the at present much neglected and apparently little valued practice of determining the Ship's position from two or three stars at twilight, a few minutes before sunrise, and a few minutes after sunset. The writer, having made a regular practice of such observations for several years of his sea life, is fully alive to the great value of the problem, and considers it to be the most valuable problem in navigation, and has consequently for the last thirty and odd years deplored the neglect of the authorities to give it in the Board of Trade examination for masters and mates.

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