FM 1-230 Meteorology for Army Aviators manual provides personnel with the general principles of modern meteorology required to assist them in planning and conducting day-to-day flight operations.   Contains 4 parts  Part 1, Weather Principles & Theory, covers atmosphere, temp., moisture, pressure, circulation, clouds, air masses and more.  Part 2, Weather Hazards, Turbulence, thunderstorms, weather radar, icing, fog, and more.  Part 3, Polar, sub polar and tropical weather, covers polar, sub polar and tropical weather.  Part 4, Weather flight planning, covers preflight & in flight planning.  All this and more in a mini spiral bound book.  Approx. 7 1/2" x 5 1/2 ".  All materials are current when shipped.