CELESTIAL-L3.1

The intercept method

CELESTIAL-M3 · Sight reduction and the position line · CELESTIAL-M3-A The intercept method of Marcq St Hilaire, worked by the cosine formula and by NP 401 and AP 3270, and plotted to a fix.

Compare what you **observed** with what you **should have seen** from a chosen position. The difference, in minutes, is the distance in miles to move the position line. That is all Marcq St Hilaire's method is.

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