MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 58
M in the station circle means thatthe weather report for the station is missing that day. The direction of the wind is indicated by a lineradiating from the ball, and the force of the wind isindicated by barbs or feathers corresponding tothe numbers of the Beaufort Scale. Around the Station Circle… … Fig. A. Station Model. I. Wind Force (17 lo 21 its. — Beaufort Force 5). 2. Tempera-ture in degrees Fahrenheit. 3. Direction of Wind (Northwest).4. Visibility in miles (lYz miles — may be urillen 1.5). 5. PresentState of Weather (Continuous light snow). 6. Cloudiness of Sky(completely overcast). 7.…
Airplanes
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