56. TABLE SHOWING THE DEPARTURE IN LINKS, FOR A DISTANCE OF ONE STATUTE MILE, BETWEEN TWO LINES AT AN ANGLE OF FROM ONE TO SIXTY MINUTES AND UPWARDS. To find polar distances for a future date, apply the annual change given in this list arithmetically, according to plus or minus sign, for number of years required. The annual variation of declination given in the nautical almanac must be reversed for stars south of the equator, that is, the signs are applied algebraically. |