MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 67
Great Circle. Fig. IB. Rhumb Line. 62 From The Ground Dp HEADINGS AND BEARINGS The direction of any point on the surface of the Earthfrom an observer 13 known, if the angle at the observerbetween a Meridian passing through the observer and aGreat Circle joining him to the object is known. This … Pig. 2. True Bearing (303°) angle is the TRUE BEARING or AZIMUTH of the point.The angle is measured clockwise from the Meridianthrough 360°. (Fig. 2). The direction of an aircraft head at any moment (i.e.,its heading). Is the angle between the longitudinal axisof the aircraft and a Meridian, or in…
Airplanes
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Common objects of the microscope [electronic resource] (1900)](https://img.insideoutlibrary.com/img/200/ia-49492157.2969.emory.edu-31-14.webp)
