MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 68
e Lubber Line. The compass needle is pivoted and is free to pointalways towards Magnetic North, regardless of whaidirection the aircraft may be heading. In Fig. 5 there isno Variation. The Magnetic Meridian, in which thecompass needle Ues, coincides with the True Meridianin which the longitudinal… … 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)
Airplanes
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