Sight Reduction Tables for Marine Navigation (Pub. No. 229)

This page allows calculation of the data in the Sight Reduction Tables for Marine Navigation (Pub. No. 229). The main purpose of this calculator is to facilitate the practice of celestial navigation at sea.  A secondary purpose is to provide the solutions of a spherical triangle of which two sides and the included angle are known and it is necessary to find the values of the third side and adjacent angle.

Latitude:	(degrees) Same name as declination (minutes) Contrary name as declination
Declination:	(degrees) (minutes)
Local Hour Angle (LHA):	(degrees) (minutes)

Altitude (Hc):	(degrees)
	(minutes)
Azimuth (Z):	(degrees)
	(minutes)

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