MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 73
them quite easy to under-stand by reference to Fig. Z. Note: In measuring the hour angles of heavenlybodies, it is simpler to think of the position of the bodyas a point on the surface of the earth, rather than onein the sky — in other words, to bring the body downon the ground for convenience in… … MERIDIAN OF STAR ____ T POINT OF ARIES Fig. Z. Hour Angles. From the foregoing, it will be clear that to find yourTrue Heading by Astro Compass, you must have areasonable knowledge of your position, know the cor-rect time (GMT) and be able to get a sight on aheavenly body. The Astro Compass, in…
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