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Adding almanac altitude angle apparent argument azimuth bearing belongs calculation called changed chart chronometer circle column compass complete computed correction corresponding Cot Sec Csc Cot Tan Csc course Csc Sec decimal declination departure determination deviation diff difference direction dist distance east equal equation error example explained final Fore formula given gives Greenwich horizon hour interpolation K Q K known larger latitude latitude and longitude latitude difference light located logarithms longitude means measured method miles minutes navigator necessary noon O.O O.O O.O object observation obtained position possible practically present problem Q K Q result S.O S.O sextant ship ship's shows SO.I star subtraction Sumner line Sumner point sun's Table tabular number taken telescope time-sight tion true watch whole
Página 30 - Bee that to divide one number by another, we subtract the log. of the divisor from the log. of the dividend, and the remainder is the log.