Altitude, azimuth, and line of position : comprising tables for working sight of heavenly body for line of position by the Cosine-Haversine formula, Marcq Saint Hilaire method and also Aquino's altitude and azimuth tables for line of position, Marcq Saint Hilaire method (1918)
United States. Hydrographic Office · Washington : Govt. Print. Off. · leaf 195
(1) The point m can only fall between P and Z by the concurrence of the threeconditions that d and L shall be of the same sign or name, that t shall be less than90°, and that L shall be less than h. Hence (fig. 1) Z<90°; M = a + i8; and, puttingCfor90°-B, C = 90°-B = (90°-L)-(90°-6) = 6-L. 187… … (2) The point m will fall between Z and Q when d and L are of the same name,if /<90° and L>&. Hence (fig. 2) Z>90°; M = a-/3; and C = 90°-B = (90°-6)-(90°-L)=L-6.
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