MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 68
Fig. towards the West, it drags the whole compass cardaround with it and the reading opposite the Lubber Lineis more (han it should be—i.e., the compass reads 30°instead of 0°. Hence, the rhyme: VARIATION WEST, MAGNETIC BEST (Better thanTrue). LUBBER LINE I (tv^ue north) … Fig. 6. Variation }0° West. Similarly, Fig. 7, when the needle is deflected Eastof the True Meridian, the compass card is rotated so thata smaller reading is opposite the Lvibber Line—i.e., thecompass now reads 320° instead of 360°, or 40° lessthan it should. (Note: North may be read as either 0°or…
Airplanes
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